Moquette is a lightweight Java MQTT broker. Prior to 0.18.1, PostOffice.publishWill publishes a client's Last-Will message without applying…

cve CVE-2026-95846 1 source, 1 claim · Watch

NVD writes:
Moquette is a lightweight Java MQTT broker. Prior to 0.18.1, PostOffice.publishWill publishes a client's Last-Will message without applying the canWrite authorization and reserved-topic checks used for a normal PUBLISH. A client can configure a Will for a topic that the client is not permitted to write and cause the broker to publish the unauthorized message when the client disconnects unexpectedly. This issue allows unauthorized message injection into restricted topics. This issue is fixed in version 0.18.1. the claim
Severity
HIGH NVD
CVSS
7.5 NVD
Vendor
moquette-io NVD
Product
moquette NVD
CWE
CWE-862 NVD

How far exploitation has got

  1. No public code known
  2. Proof of concept
  3. Proof of concept, verified
  4. A Metasploit module
  5. Exploited in the wild
  6. Used in ransomware campaigns

Timeline

2026-09-23first spoke of it: Moquette is a lightweight Java MQTT broker. Prior to 0.18.1, PostOffice.publishWill publishes a client's Last-Will message without applying the canWrite authorization and reserved-topic checks used for a normal PUBLISH. A client can configure a Will for a topic that the client is not permitted to write and cause the broker to publish the unauthorized message when the client disconnects unexpectedly. This issue allows unauthorized message injection into restricted topics. This issue is fixed in version 0.18.1.NVD

Moquette is a lightweight Java MQTT broker. Prior to 0.18.1, PostOffice.publishWill publishes a client's Last-Will message without applying the canWrite authorization and reserved-topic checks used for a normal PUBLISH. A client can configure a Will for a topic that the client is not permitted to write and cause the broker to publish the unauthorized message when the client disconnects unexpectedly. This issue allows unauthorized message injection into restricted topics. This issue is fixed in version 0.18.1.

What it is to other things

affectsmoquette/moquette
NVD
made_bymoquette
NVD

In words only, so not counted until a person confirms one:

made_bymoquette_io
NVD says “moquette-io”
affectsmoquette_io/moquette
NVD says “moquette-io · moquette”
Every value, with what each source said and its receipt
PropertySourceSaidMeans here
Automatable
automatable
NVDyes
An attacker can reliably run all of the kill chain's first four steps without a person.
receipt
Source
NVD
Its words
yes
Read by
field:cve.metrics.ssvcV203[].ssvcData.options[].automatable
Said since
2026-10-06 12:31 UTC
Last answered
2026-10-06 12:41 UTC
Original
open at the source
2026-10-06 12:31 UTCyes
2026-09-29 09:45 UTC—
What the source handed over
{
  "cve": {
    "affected": [
      {
        "affectedData": [
          {
            "product": "moquette",
            "vendor": "moquette-io",
            "versions": [
              {
                "status": "affected",
                "version": "< 0.18.1"
              }
            ]
          }
        ],
        "source": "security-advisories@github.com"
      }
    ],
    "configurations": [
      {
        "nodes": [
          {
            "cpeMatch": [
              {
                "criteria": "cpe:2.3:a:moquette:moquette:*:*:*:*:*:*:*:*",
                "matchCriteriaId": "3C13C0A2-7D78-4742-8861-54D487319A82",
                "versionEndExcluding": "0.18.1",
                "vulnerable": true
              }
            ],
            "negate": false,
            "operator": "OR"
          }
        ]
      }
    ],
    "cveTags": [],
    "descriptions": [
      {
        "lang": "en",
        "value": "Moquette is a lightweight Java MQTT broker. Prior to 0.18.1, PostOffice.publishWill publishes a client's Last-Will message without applying the canWrite authorization and reserved-topic checks used for a normal PUBLISH. A client can configure a Will for a topic that the client is not permitted to write and cause the broker to publish the unauthorized message when the client disconnects unexpectedly. This issue allows unauthorized message injection into restricted topics. This issue is fixed in version 0.18.1."
      }
    ],
    "id": "CVE-2026-95846",
    "lastModified": "2026-09-25T13:34:02.580",
    "metrics": {
      "cvssMetricV31": [
        {
          "cvssData": {
            "attackComplexity": "LOW",
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            "confidentialityImpact": "NONE",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
            "version": "3.1"
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            "modifiedAttackRequirements": "NOT_DEFINED",
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            "modifiedPrivilegesRequired": "NOT_DEFINED",
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            "version": "2.0.3"
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    "references": [
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        "source": "security-advisories@github.com",
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        "source": "security-advisories@github.com",
        "tags": [
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        "url": "https://github.com/moquette-io/moquette/releases/tag/v0.18.1"
      },
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        "source": "security-advisories@github.com",
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          "Vendor Advisory"
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        "url": "https://github.com/moquette-io/moquette/security/advisories/GHSA-5f42-97gr-vfhq"
      },
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "tags": [
          "Exploit",
          "Mitigation",
          "Vendor Advisory"
        ],
        "url": "https://github.com/moquette-io/moquette/security/advisories/GHSA-5f42-97gr-vfhq"
      }
    ],
    "sourceIdentifier": "security-advisories@github.com",
    "vulnStatus": "Analyzed",
    "weaknesses": [
      {
        "description": [
          {
            "lang": "en",
            "value": "CWE-862"
          }
        ],
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ]
  }
}
—
CVSS
cvss
NVD7.5
receipt
Source
NVD
Its words
7.5
Read by
field:cve.metrics.cvssMetricV31[type=Primary].cvssData.baseScore || field:cve.metrics.cvssMetricV31[].cvssData.baseScore
Said since
2026-09-29 09:45 UTC
Last answered
2026-10-06 12:41 UTC
Original
open at the source
What the source handed over
{
  "cve": {
    "affected": [
      {
        "affectedData": [
          {
            "product": "moquette",
            "vendor": "moquette-io",
            "versions": [
              {
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                "versionEndExcluding": "0.18.1",
                "vulnerable": true
              }
            ],
            "negate": false,
            "operator": "OR"
          }
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    ],
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      }
    ],
    "id": "CVE-2026-95846",
    "lastModified": "2026-09-25T13:34:02.580",
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}
—
Cvss4
cvss4
NVD8.7
receipt
Source
NVD
Its words
8.7
Read by
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Said since
2026-10-06 12:31 UTC
Last answered
2026-10-06 12:41 UTC
Original
open at the source
2026-10-06 12:31 UTC8.7
2026-09-29 09:45 UTC—
What the source handed over
{
  "cve": {
    "affected": [
      {
        "affectedData": [
          {
            "product": "moquette",
            "vendor": "moquette-io",
            "versions": [
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      }
    ],
    "id": "CVE-2026-95846",
    "lastModified": "2026-09-25T13:34:02.580",
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      },
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        ],
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ]
  }
}
—
Cvss4 vector
cvss4_vector
NVDCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
receipt
Source
NVD
Its words
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Read by
field:cve.metrics.cvssMetricV40[type=Primary].cvssData.vectorString || field:cve.metrics.cvssMetricV40[].cvssData.vectorString
Said since
2026-10-06 12:31 UTC
Last answered
2026-10-06 12:41 UTC
Original
open at the source
2026-10-06 12:31 UTCCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
2026-09-29 09:45 UTC—
What the source handed over
{
  "cve": {
    "affected": [
      {
        "affectedData": [
          {
            "product": "moquette",
            "vendor": "moquette-io",
            "versions": [
              {
                "status": "affected",
                "version": "< 0.18.1"
              }
            ]
          }
        ],
        "source": "security-advisories@github.com"
      }
    ],
    "configurations": [
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                "matchCriteriaId": "3C13C0A2-7D78-4742-8861-54D487319A82",
                "versionEndExcluding": "0.18.1",
                "vulnerable": true
              }
            ],
            "negate": false,
            "operator": "OR"
          }
        ]
      }
    ],
    "cveTags": [],
    "descriptions": [
      {
        "lang": "en",
        "value": "Moquette is a lightweight Java MQTT broker. Prior to 0.18.1, PostOffice.publishWill publishes a client's Last-Will message without applying the canWrite authorization and reserved-topic checks used for a normal PUBLISH. A client can configure a Will for a topic that the client is not permitted to write and cause the broker to publish the unauthorized message when the client disconnects unexpectedly. This issue allows unauthorized message injection into restricted topics. This issue is fixed in version 0.18.1."
      }
    ],
    "id": "CVE-2026-95846",
    "lastModified": "2026-09-25T13:34:02.580",
    "metrics": {
      "cvssMetricV31": [
        {
          "cvssData": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
            "version": "3.1"
          },
          "exploitabilityScore": 3.9,
          "impactScore": 3.6,
          "source": "nvd@nist.gov",
          "type": "Primary"
        }
      ],
      "cvssMetricV40": [
        {
          "cvssData": {
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            "Recovery": "NOT_DEFINED",
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            "baseSeverity": "HIGH",
            "confidentialityRequirement": "NOT_DEFINED",
            "exploitMaturity": "NOT_DEFINED",
            "integrityRequirement": "NOT_DEFINED",
            "modifiedAttackComplexity": "NOT_DEFINED",
            "modifiedAttackRequirements": "NOT_DEFINED",
            "modifiedAttackVector": "NOT_DEFINED",
            "modifiedPrivilegesRequired": "NOT_DEFINED",
            "modifiedSubAvailabilityImpact": "NOT_DEFINED",
            "modifiedSubConfidentialityImpact": "NOT_DEFINED",
            "modifiedSubIntegrityImpact": "NOT_DEFINED",
            "modifiedUserInteraction": "NOT_DEFINED",
            "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
            "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
            "modifiedVulnIntegrityImpact": "NOT_DEFINED",
            "privilegesRequired": "NONE",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
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            "vulnAvailabilityImpact": "NONE",
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      ],
      "ssvcV203": [
        {
          "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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            "options": [
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                "exploitation": "poc"
              },
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              },
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            "role": "CISA Coordinator",
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          }
        }
      ]
    },
    "published": "2026-09-23T17:17:21.627",
    "references": [
      {
        "source": "security-advisories@github.com",
        "tags": [
          "Patch"
        ],
        "url": "https://github.com/moquette-io/moquette/commit/f5a323fe782d1505c0097498cb22eb6ec6c96973"
      },
      {
        "source": "security-advisories@github.com",
        "tags": [
          "Release Notes"
        ],
        "url": "https://github.com/moquette-io/moquette/releases/tag/v0.18.1"
      },
      {
        "source": "security-advisories@github.com",
        "tags": [
          "Exploit",
          "Mitigation",
          "Vendor Advisory"
        ],
        "url": "https://github.com/moquette-io/moquette/security/advisories/GHSA-5f42-97gr-vfhq"
      },
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "tags": [
          "Exploit",
          "Mitigation",
          "Vendor Advisory"
        ],
        "url": "https://github.com/moquette-io/moquette/security/advisories/GHSA-5f42-97gr-vfhq"
      }
    ],
    "sourceIdentifier": "security-advisories@github.com",
    "vulnStatus": "Analyzed",
    "weaknesses": [
      {
        "description": [
          {
            "lang": "en",
            "value": "CWE-862"
          }
        ],
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ]
  }
}
—
CVSS vector
cvss_vector
NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
receipt
Source
NVD
Its words
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Read by
field:cve.metrics.cvssMetricV31[type=Primary].cvssData.vectorString || field:cve.metrics.cvssMetricV31[].cvssData.vectorString
Said since
2026-10-06 12:31 UTC
Last answered
2026-10-06 12:41 UTC
Original
open at the source
2026-10-06 12:31 UTCCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
2026-09-29 09:45 UTC—
What the source handed over
{
  "cve": {
    "affected": [
      {
        "affectedData": [
          {
            "product": "moquette",
            "vendor": "moquette-io",
            "versions": [
              {
                "status": "affected",
                "version": "< 0.18.1"
              }
            ]
          }
        ],
        "source": "security-advisories@github.com"
      }
    ],
    "configurations": [
      {
        "nodes": [
          {
            "cpeMatch": [
              {
                "criteria": "cpe:2.3:a:moquette:moquette:*:*:*:*:*:*:*:*",
                "matchCriteriaId": "3C13C0A2-7D78-4742-8861-54D487319A82",
                "versionEndExcluding": "0.18.1",
                "vulnerable": true
              }
            ],
            "negate": false,
            "operator": "OR"
          }
        ]
      }
    ],
    "cveTags": [],
    "descriptions": [
      {
        "lang": "en",
        "value": "Moquette is a lightweight Java MQTT broker. Prior to 0.18.1, PostOffice.publishWill publishes a client's Last-Will message without applying the canWrite authorization and reserved-topic checks used for a normal PUBLISH. A client can configure a Will for a topic that the client is not permitted to write and cause the broker to publish the unauthorized message when the client disconnects unexpectedly. This issue allows unauthorized message injection into restricted topics. This issue is fixed in version 0.18.1."
      }
    ],
    "id": "CVE-2026-95846",
    "lastModified": "2026-09-25T13:34:02.580",
    "metrics": {
      "cvssMetricV31": [
        {
          "cvssData": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
            "version": "3.1"
          },
          "exploitabilityScore": 3.9,
          "impactScore": 3.6,
          "source": "nvd@nist.gov",
          "type": "Primary"
        }
      ],
      "cvssMetricV40": [
        {
          "cvssData": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "availabilityRequirement": "NOT_DEFINED",
            "baseScore": 8.7,
            "baseSeverity": "HIGH",
            "confidentialityRequirement": "NOT_DEFINED",
            "exploitMaturity": "NOT_DEFINED",
            "integrityRequirement": "NOT_DEFINED",
            "modifiedAttackComplexity": "NOT_DEFINED",
            "modifiedAttackRequirements": "NOT_DEFINED",
            "modifiedAttackVector": "NOT_DEFINED",
            "modifiedPrivilegesRequired": "NOT_DEFINED",
            "modifiedSubAvailabilityImpact": "NOT_DEFINED",
            "modifiedSubConfidentialityImpact": "NOT_DEFINED",
            "modifiedSubIntegrityImpact": "NOT_DEFINED",
            "modifiedUserInteraction": "NOT_DEFINED",
            "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
            "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
            "modifiedVulnIntegrityImpact": "NOT_DEFINED",
            "privilegesRequired": "NONE",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "HIGH",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "source": "security-advisories@github.com",
          "type": "Secondary"
        }
      ],
      "ssvcV203": [
        {
          "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "ssvcData": {
            "id": "CVE-2026-95846",
            "options": [
              {
                "exploitation": "poc"
              },
              {
                "automatable": "yes"
              },
              {
                "technicalImpact": "partial"
              }
            ],
            "role": "CISA Coordinator",
            "timestamp": "2026-09-24T14:21:37.380771Z",
            "version": "2.0.3"
          }
        }
      ]
    },
    "published": "2026-09-23T17:17:21.627",
    "references": [
      {
        "source": "security-advisories@github.com",
        "tags": [
          "Patch"
        ],
        "url": "https://github.com/moquette-io/moquette/commit/f5a323fe782d1505c0097498cb22eb6ec6c96973"
      },
      {
        "source": "security-advisories@github.com",
        "tags": [
          "Release Notes"
        ],
        "url": "https://github.com/moquette-io/moquette/releases/tag/v0.18.1"
      },
      {
        "source": "security-advisories@github.com",
        "tags": [
          "Exploit",
          "Mitigation",
          "Vendor Advisory"
        ],
        "url": "https://github.com/moquette-io/moquette/security/advisories/GHSA-5f42-97gr-vfhq"
      },
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "tags": [
          "Exploit",
          "Mitigation",
          "Vendor Advisory"
        ],
        "url": "https://github.com/moquette-io/moquette/security/advisories/GHSA-5f42-97gr-vfhq"
      }
    ],
    "sourceIdentifier": "security-advisories@github.com",
    "vulnStatus": "Analyzed",
    "weaknesses": [
      {
        "description": [
          {
            "lang": "en",
            "value": "CWE-862"
          }
        ],
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ]
  }
}
—
CWE
cwe
NVDCWE-862
receipt
Source
NVD
Its words
CWE-862
Read by
field:cve.weaknesses[].description[].value
Said since
2026-10-06 12:31 UTC
Last answered
2026-10-06 12:41 UTC
Original
open at the source
2026-10-06 12:31 UTCCWE-862
2026-09-29 09:45 UTC—
What the source handed over
{
  "cve": {
    "affected": [
      {
        "affectedData": [
          {
            "product": "moquette",
            "vendor": "moquette-io",
            "versions": [
              {
                "status": "affected",
                "version": "< 0.18.1"
              }
            ]
          }
        ],
        "source": "security-advisories@github.com"
      }
    ],
    "configurations": [
      {
        "nodes": [
          {
            "cpeMatch": [
              {
                "criteria": "cpe:2.3:a:moquette:moquette:*:*:*:*:*:*:*:*",
                "matchCriteriaId": "3C13C0A2-7D78-4742-8861-54D487319A82",
                "versionEndExcluding": "0.18.1",
                "vulnerable": true
              }
            ],
            "negate": false,
            "operator": "OR"
          }
        ]
      }
    ],
    "cveTags": [],
    "descriptions": [
      {
        "lang": "en",
        "value": "Moquette is a lightweight Java MQTT broker. Prior to 0.18.1, PostOffice.publishWill publishes a client's Last-Will message without applying the canWrite authorization and reserved-topic checks used for a normal PUBLISH. A client can configure a Will for a topic that the client is not permitted to write and cause the broker to publish the unauthorized message when the client disconnects unexpectedly. This issue allows unauthorized message injection into restricted topics. This issue is fixed in version 0.18.1."
      }
    ],
    "id": "CVE-2026-95846",
    "lastModified": "2026-09-25T13:34:02.580",
    "metrics": {
      "cvssMetricV31": [
        {
          "cvssData": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
            "version": "3.1"
          },
          "exploitabilityScore": 3.9,
          "impactScore": 3.6,
          "source": "nvd@nist.gov",
          "type": "Primary"
        }
      ],
      "cvssMetricV40": [
        {
          "cvssData": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "availabilityRequirement": "NOT_DEFINED",
            "baseScore": 8.7,
            "baseSeverity": "HIGH",
            "confidentialityRequirement": "NOT_DEFINED",
            "exploitMaturity": "NOT_DEFINED",
            "integrityRequirement": "NOT_DEFINED",
            "modifiedAttackComplexity": "NOT_DEFINED",
            "modifiedAttackRequirements": "NOT_DEFINED",
            "modifiedAttackVector": "NOT_DEFINED",
            "modifiedPrivilegesRequired": "NOT_DEFINED",
            "modifiedSubAvailabilityImpact": "NOT_DEFINED",
            "modifiedSubConfidentialityImpact": "NOT_DEFINED",
            "modifiedSubIntegrityImpact": "NOT_DEFINED",
            "modifiedUserInteraction": "NOT_DEFINED",
            "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
            "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
            "modifiedVulnIntegrityImpact": "NOT_DEFINED",
            "privilegesRequired": "NONE",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "HIGH",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "source": "security-advisories@github.com",
          "type": "Secondary"
        }
      ],
      "ssvcV203": [
        {
          "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "ssvcData": {
            "id": "CVE-2026-95846",
            "options": [
              {
                "exploitation": "poc"
              },
              {
                "automatable": "yes"
              },
              {
                "technicalImpact": "partial"
              }
            ],
            "role": "CISA Coordinator",
            "timestamp": "2026-09-24T14:21:37.380771Z",
            "version": "2.0.3"
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    "published": "2026-09-23T17:17:21.627",
    "references": [
      {
        "source": "security-advisories@github.com",
        "tags": [
          "Patch"
        ],
        "url": "https://github.com/moquette-io/moquette/commit/f5a323fe782d1505c0097498cb22eb6ec6c96973"
      },
      {
        "source": "security-advisories@github.com",
        "tags": [
          "Release Notes"
        ],
        "url": "https://github.com/moquette-io/moquette/releases/tag/v0.18.1"
      },
      {
        "source": "security-advisories@github.com",
        "tags": [
          "Exploit",
          "Mitigation",
          "Vendor Advisory"
        ],
        "url": "https://github.com/moquette-io/moquette/security/advisories/GHSA-5f42-97gr-vfhq"
      },
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "tags": [
          "Exploit",
          "Mitigation",
          "Vendor Advisory"
        ],
        "url": "https://github.com/moquette-io/moquette/security/advisories/GHSA-5f42-97gr-vfhq"
      }
    ],
    "sourceIdentifier": "security-advisories@github.com",
    "vulnStatus": "Analyzed",
    "weaknesses": [
      {
        "description": [
          {
            "lang": "en",
            "value": "CWE-862"
          }
        ],
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ]
  }
}
—
Exploitation
exploitation
NVDpoc
A public proof of concept exists, or exploitation is trivial.
receipt
Source
NVD
Its words
poc
Read by
field:cve.metrics.ssvcV203[].ssvcData.options[].exploitation
Said since
2026-10-06 12:31 UTC
Last answered
2026-10-06 12:41 UTC
Original
open at the source
2026-10-06 12:31 UTCpoc
2026-09-29 09:45 UTC—
What the source handed over
{
  "cve": {
    "affected": [
      {
        "affectedData": [
          {
            "product": "moquette",
            "vendor": "moquette-io",
            "versions": [
              {
                "status": "affected",
                "version": "< 0.18.1"
              }
            ]
          }
        ],
        "source": "security-advisories@github.com"
      }
    ],
    "configurations": [
      {
        "nodes": [
          {
            "cpeMatch": [
              {
                "criteria": "cpe:2.3:a:moquette:moquette:*:*:*:*:*:*:*:*",
                "matchCriteriaId": "3C13C0A2-7D78-4742-8861-54D487319A82",
                "versionEndExcluding": "0.18.1",
                "vulnerable": true
              }
            ],
            "negate": false,
            "operator": "OR"
          }
        ]
      }
    ],
    "cveTags": [],
    "descriptions": [
      {
        "lang": "en",
        "value": "Moquette is a lightweight Java MQTT broker. Prior to 0.18.1, PostOffice.publishWill publishes a client's Last-Will message without applying the canWrite authorization and reserved-topic checks used for a normal PUBLISH. A client can configure a Will for a topic that the client is not permitted to write and cause the broker to publish the unauthorized message when the client disconnects unexpectedly. This issue allows unauthorized message injection into restricted topics. This issue is fixed in version 0.18.1."
      }
    ],
    "id": "CVE-2026-95846",
    "lastModified": "2026-09-25T13:34:02.580",
    "metrics": {
      "cvssMetricV31": [
        {
          "cvssData": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
            "version": "3.1"
          },
          "exploitabilityScore": 3.9,
          "impactScore": 3.6,
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  }
}
—
Product
product
NVDmoquette
receipt
Source
NVD
Its words
moquette
Read by
field:cve.affected[].affectedData[].product
Said since
2026-09-29 17:49 UTC
Last answered
2026-10-06 12:41 UTC
Original
open at the source
2026-09-29 17:49 UTCmoquette
2026-09-29 09:45 UTC—
What the source handed over
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}
—
Severity
severity
NVDHIGH
From 7.0 to 8.9.
receipt
Source
NVD
Its words
HIGH
Read by
field:cve.metrics.cvssMetricV31[type=Primary].cvssData.baseSeverity || field:cve.metrics.cvssMetricV31[].cvssData.baseSeverity
Said since
2026-10-06 12:31 UTC
Last answered
2026-10-06 12:41 UTC
Original
open at the source
2026-10-06 12:31 UTCHIGH
2026-09-29 09:45 UTC—
What the source handed over
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    ],
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high
Status
status
NVDAnalyzed
receipt
Source
NVD
Its words
Analyzed
Read by
field:cve.vulnStatus
Said since
2026-09-29 09:45 UTC
Last answered
2026-10-06 12:41 UTC
Original
open at the source
What the source handed over
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            "vendor": "moquette-io",
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          "Release Notes"
        ],
        "url": "https://github.com/moquette-io/moquette/releases/tag/v0.18.1"
      },
      {
        "source": "security-advisories@github.com",
        "tags": [
          "Exploit",
          "Mitigation",
          "Vendor Advisory"
        ],
        "url": "https://github.com/moquette-io/moquette/security/advisories/GHSA-5f42-97gr-vfhq"
      },
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "tags": [
          "Exploit",
          "Mitigation",
          "Vendor Advisory"
        ],
        "url": "https://github.com/moquette-io/moquette/security/advisories/GHSA-5f42-97gr-vfhq"
      }
    ],
    "sourceIdentifier": "security-advisories@github.com",
    "vulnStatus": "Analyzed",
    "weaknesses": [
      {
        "description": [
          {
            "lang": "en",
            "value": "CWE-862"
          }
        ],
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ]
  }
}
—
Technical impact
technical_impact
NVDpartial
The attacker gains limited control, or limited information.
receipt
Source
NVD
Its words
partial
Read by
field:cve.metrics.ssvcV203[].ssvcData.options[].technicalImpact
Said since
2026-10-06 12:31 UTC
Last answered
2026-10-06 12:41 UTC
Original
open at the source
2026-10-06 12:31 UTCpartial
2026-09-29 09:45 UTC—
What the source handed over
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  "cve": {
    "affected": [
      {
        "affectedData": [
          {
            "product": "moquette",
            "vendor": "moquette-io",
            "versions": [
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                "versionEndExcluding": "0.18.1",
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      }
    ],
    "id": "CVE-2026-95846",
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    "metrics": {
      "cvssMetricV31": [
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          "cvssData": {
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            "modifiedAttackRequirements": "NOT_DEFINED",
            "modifiedAttackVector": "NOT_DEFINED",
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            "modifiedSubConfidentialityImpact": "NOT_DEFINED",
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            "privilegesRequired": "NONE",
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      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "tags": [
          "Exploit",
          "Mitigation",
          "Vendor Advisory"
        ],
        "url": "https://github.com/moquette-io/moquette/security/advisories/GHSA-5f42-97gr-vfhq"
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    ],
    "sourceIdentifier": "security-advisories@github.com",
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            "value": "CWE-862"
          }
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        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ]
  }
}
—
Vendor
vendor
NVDmoquette-io
receipt
Source
NVD
Its words
moquette-io
Read by
field:cve.affected[].affectedData[].vendor
Said since
2026-09-29 17:49 UTC
Last answered
2026-10-06 12:41 UTC
Original
open at the source
2026-09-29 17:49 UTCmoquette-io
2026-09-29 09:45 UTC—
What the source handed over
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  "cve": {
    "affected": [
      {
        "affectedData": [
          {
            "product": "moquette",
            "vendor": "moquette-io",
            "versions": [
              {
                "status": "affected",
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            ]
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        "source": "security-advisories@github.com"
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                "versionEndExcluding": "0.18.1",
                "vulnerable": true
              }
            ],
            "negate": false,
            "operator": "OR"
          }
        ]
      }
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    "cveTags": [],
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      }
    ],
    "id": "CVE-2026-95846",
    "lastModified": "2026-09-25T13:34:02.580",
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          "type": "Primary"
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      ],
      "cvssMetricV40": [
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            "modifiedAttackComplexity": "NOT_DEFINED",
            "modifiedAttackRequirements": "NOT_DEFINED",
            "modifiedAttackVector": "NOT_DEFINED",
            "modifiedPrivilegesRequired": "NOT_DEFINED",
            "modifiedSubAvailabilityImpact": "NOT_DEFINED",
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            "privilegesRequired": "NONE",
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                "technicalImpact": "partial"
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            ],
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      },
      {
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        "tags": [
          "Exploit",
          "Mitigation",
          "Vendor Advisory"
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      },
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "tags": [
          "Exploit",
          "Mitigation",
          "Vendor Advisory"
        ],
        "url": "https://github.com/moquette-io/moquette/security/advisories/GHSA-5f42-97gr-vfhq"
      }
    ],
    "sourceIdentifier": "security-advisories@github.com",
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          }
        ],
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ]
  }
}
—
Every claim, by kind

vulnerability

Moquette is a lightweight Java MQTT broker. Prior to 0.18.1, PostOffice.publishWill publishes a client's Last-Will message without applying the canWrite authorization and reserved-topic checks used for a normal PUBLISH. A client can configure a Will for a topic that the client is not permitted to write and cause the broker to publish the unauthorized message when the client disconnects unexpectedly. This issue allows unauthorized message injection into restricted topics. This issue is fixed in version 0.18.1.
zetlyn/cve-nvd · 2026-09-23
automatable yes cvss 7.5 cvss4 8.7 cvss4_vector CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X cvss_vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N cwe CWE-862 exploitation poc product moquette severity HIGH status Analyzed technical_impact partial vendor moquette-io source