firefox: thunderbird: Sandbox escape due to incorrect boundary conditions in the Widget: Win32 component

cve CVE-2026-92071 2 sources, 2 claims · Watch

Red Hat writes:
firefox: thunderbird: Sandbox escape due to incorrect boundary conditions in the Widget: Win32 component the claim

Severity they disagree: CRITICAL NVD
low Red Hat
CVSS they disagree: 9.6 NVD
3.4 Red Hat
Vendor: Mozilla NVD
Product: Firefox NVD
CWE: CWE-119 NVD
CWE-501 Red Hat

How far exploitation has got

No public code known
Proof of concept
Proof of concept, verified
A Metasploit module
Exploited in the wild
Used in ransomware campaigns

Why the CVSS differs

Metric	NVD	Red Hat
Attack vector AV	network N	network N
Attack complexity AC	low L	high H
Privileges required PR	none N	none N
User interaction UI	required R	required R
Scope S	changed C	changed C
Confidentiality C	high H	low L
Integrity I	high H	none N
Availability A	high H	none N

Each source scores the same vulnerability from what it judges the attack to need. The rows marked are where they judge it differently.

Timeline

2026-09-15	first spoke of it: Sandbox escape due to incorrect boundary conditions in the Widget: Win32 component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3.	NVD
2026-09-15	first spoke of it: firefox: thunderbird: Sandbox escape due to incorrect boundary conditions in the Widget: Win32 component	Red Hat

What it is to other things

affects	mozilla/firefox NVD
affects	mozilla/thunderbird NVD
made_by	mozilla NVD

Every value, with what each source said and its receipt

Property Source Said Means here

Automatable

automatable

NVD

At least one of those steps needs a person.

receipt

Source: NVD
Its words: no
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 UTC	no
2026-09-29 09:45 UTC	—

What the source handed over

{
  "cve": {
    "affected": [
      {
        "affectedData": [
          {
            "product": "Firefox",
            "vendor": "Mozilla",
            "versions": [
              {
                "lessThanOrEqual": "153.*",
                "status": "unaffected",
                "version": "153.3",
                "versionType": "rpm"
              },
              {
                "lessThanOrEqual": "*",
                "status": "unaffected",
                "version": "156",
                "versionType": "rpm"
              }
            ]
          },
          {
            "product": "Thunderbird",
            "vendor": "Mozilla",
            "versions": [
              {
                "lessThanOrEqual": "153.*",
                "status": "unaffected",
                "version": "153.3",
                "versionType": "rpm"
              },
              {
                "lessThanOrEqual": "*",
                "status": "unaffected",
                "version": "156",
                "versionType": "rpm"
              }
            ]
          }
        ],
        "source": "security@mozilla.org"
      }
    ],
    "configurations": [
      {
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                "versionEndExcluding": "153.3.0",
                "vulnerable": true
              },
              {
                "criteria": "cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*",
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      }
    ],
    "id": "CVE-2026-92071",
    "lastModified": "2026-10-05T19:40:32.353",
    "metrics": {
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          "cvssData": {
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            "attackVector": "NETWORK",
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            "baseSeverity": "CRITICAL",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H",
            "version": "3.1"
          },
          "exploitabilityScore": 2.8,
          "impactScore": 6.0,
          "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "type": "Secondary"
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            "timestamp": "2026-09-22T15:25:58.982715Z",
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    "published": "2026-09-15T13:17:01.860",
    "references": [
      {
        "source": "security@mozilla.org",
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        "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=2061231"
      },
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        "source": "security@mozilla.org",
        "tags": [
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        "url": "https://www.mozilla.org/security/advisories/mfsa2026-90/"
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        "source": "security@mozilla.org",
        "tags": [
          "Vendor Advisory"
        ],
        "url": "https://www.mozilla.org/security/advisories/mfsa2026-94/"
      },
      {
        "source": "security@mozilla.org",
        "tags": [
          "Vendor Advisory"
        ],
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      }
    ],
    "sourceIdentifier": "security@mozilla.org",
    "vulnStatus": "Analyzed",
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            "value": "CWE-119"
          }
        ],
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
      }
    ]
  }
}

—

CVSS

cvss

conflict

NVD

9.6

receipt

Source: NVD
Its words: 9.6
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": "Firefox",
            "vendor": "Mozilla",
            "versions": [
              {
                "lessThanOrEqual": "153.*",
                "status": "unaffected",
                "version": "153.3",
                "versionType": "rpm"
              },
              {
                "lessThanOrEqual": "*",
                "status": "unaffected",
                "version": "156",
                "versionType": "rpm"
              }
            ]
          },
          {
            "product": "Thunderbird",
            "vendor": "Mozilla",
            "versions": [
              {
                "lessThanOrEqual": "153.*",
                "status": "unaffected",
                "version": "153.3",
                "versionType": "rpm"
              },
              {
                "lessThanOrEqual": "*",
                "status": "unaffected",
                "version": "156",
                "versionType": "rpm"
              }
            ]
          }
        ],
        "source": "security@mozilla.org"
      }
    ],
    "configurations": [
      {
        "nodes": [
          {
            "cpeMatch": [
              {
                "criteria": "cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*",
                "matchCriteriaId": "716987A4-C64C-4D20-9BE8-0A155FE924C1",
                "versionEndExcluding": "153.3.0",
                "vulnerable": true
              },
              {
                "criteria": "cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*",
                "matchCriteriaId": "E886B97A-3CF5-49E0-A360-6B176B75CB8E",
                "versionEndExcluding": "156.0.0",
                "versionStartIncluding": "154.0.0",
                "vulnerable": true
              },
              {
                "criteria": "cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*",
                "matchCriteriaId": "73AE1D76-5830-42C6-9C38-5A58F8A8CE52",
                "versionEndExcluding": "153.3.0",
                "vulnerable": true
              },
              {
                "criteria": "cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*",
                "matchCriteriaId": "7AAB410A-D0F0-4BDB-9FBB-8F8EBCB7EAAF",
                "versionEndExcluding": "156.0",
                "versionStartIncluding": "154.0",
                "vulnerable": true
              }
            ],
            "negate": false,
            "operator": "OR"
          }
        ]
      }
    ],
    "cveTags": [],
    "descriptions": [
      {
        "lang": "en",
        "value": "Sandbox escape due to incorrect boundary conditions in the Widget: Win32 component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3."
      }
    ],
    "id": "CVE-2026-92071",
    "lastModified": "2026-10-05T19:40:32.353",
    "metrics": {
      "cvssMetricV31": [
        {
          "cvssData": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 9.6,
            "baseSeverity": "CRITICAL",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H",
            "version": "3.1"
          },
          "exploitabilityScore": 2.8,
          "impactScore": 6.0,
          "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "type": "Secondary"
        }
      ],
      "ssvcV203": [
        {
          "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "ssvcData": {
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            "options": [
              {
                "exploitation": "none"
              },
              {
                "automatable": "no"
              },
              {
                "technicalImpact": "total"
              }
            ],
            "role": "CISA Coordinator",
            "timestamp": "2026-09-22T15:25:58.982715Z",
            "version": "2.0.3"
          }
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      ]
    },
    "published": "2026-09-15T13:17:01.860",
    "references": [
      {
        "source": "security@mozilla.org",
        "tags": [
          "Permissions Required"
        ],
        "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=2061231"
      },
      {
        "source": "security@mozilla.org",
        "tags": [
          "Vendor Advisory"
        ],
        "url": "https://www.mozilla.org/security/advisories/mfsa2026-90/"
      },
      {
        "source": "security@mozilla.org",
        "tags": [
          "Vendor Advisory"
        ],
        "url": "https://www.mozilla.org/security/advisories/mfsa2026-93/"
      },
      {
        "source": "security@mozilla.org",
        "tags": [
          "Vendor Advisory"
        ],
        "url": "https://www.mozilla.org/security/advisories/mfsa2026-94/"
      },
      {
        "source": "security@mozilla.org",
        "tags": [
          "Vendor Advisory"
        ],
        "url": "https://www.mozilla.org/security/advisories/mfsa2026-96/"
      }
    ],
    "sourceIdentifier": "security@mozilla.org",
    "vulnStatus": "Analyzed",
    "weaknesses": [
      {
        "description": [
          {
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            "value": "CWE-119"
          }
        ],
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
      }
    ]
  }
}

—

CVSS

cvss

conflict

Red Hat

3.4

receipt

Source: Red Hat
Its words: 3.4
Read by: field:cvss3_score
Said since: 2026-09-29 09:44 UTC
Last answered: 2026-10-06 13:02 UTC
Original: open at the source

What the source handed over

{
  "CVE": "CVE-2026-92071",
  "CWE": "CWE-501",
  "advisories": [],
  "affected_packages": [],
  "bugzilla": "2533733",
  "bugzilla_description": "firefox: thunderbird: Sandbox escape due to incorrect boundary conditions in the Widget: Win32 component",
  "cvss3_score": "3.4",
  "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:N/A:N",
  "cvss_score": null,
  "cvss_scoring_vector": null,
  "package_state": null,
  "public_date": "2026-09-15T12:34:33Z",
  "resource_url": "https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-92071.json",
  "severity": "low"
}

—

CVSS vector

cvss_vector

not compared

NVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

receipt

Source: NVD
Its words: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
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 UTC	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
2026-09-29 09:45 UTC	—

What the source handed over

{
  "cve": {
    "affected": [
      {
        "affectedData": [
          {
            "product": "Firefox",
            "vendor": "Mozilla",
            "versions": [
              {
                "lessThanOrEqual": "153.*",
                "status": "unaffected",
                "version": "153.3",
                "versionType": "rpm"
              },
              {
                "lessThanOrEqual": "*",
                "status": "unaffected",
                "version": "156",
                "versionType": "rpm"
              }
            ]
          },
          {
            "product": "Thunderbird",
            "vendor": "Mozilla",
            "versions": [
              {
                "lessThanOrEqual": "153.*",
                "status": "unaffected",
                "version": "153.3",
                "versionType": "rpm"
              },
              {
                "lessThanOrEqual": "*",
                "status": "unaffected",
                "version": "156",
                "versionType": "rpm"
              }
            ]
          }
        ],
        "source": "security@mozilla.org"
      }
    ],
    "configurations": [
      {
        "nodes": [
          {
            "cpeMatch": [
              {
                "criteria": "cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*",
                "matchCriteriaId": "716987A4-C64C-4D20-9BE8-0A155FE924C1",
                "versionEndExcluding": "153.3.0",
                "vulnerable": true
              },
              {
                "criteria": "cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*",
                "matchCriteriaId": "E886B97A-3CF5-49E0-A360-6B176B75CB8E",
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                "vulnerable": true
              },
              {
                "criteria": "cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*",
                "matchCriteriaId": "73AE1D76-5830-42C6-9C38-5A58F8A8CE52",
                "versionEndExcluding": "153.3.0",
                "vulnerable": true
              },
              {
                "criteria": "cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*",
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              }
            ],
            "negate": false,
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    ],
    "cveTags": [],
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        "lang": "en",
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      }
    ],
    "id": "CVE-2026-92071",
    "lastModified": "2026-10-05T19:40:32.353",
    "metrics": {
      "cvssMetricV31": [
        {
          "cvssData": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 9.6,
            "baseSeverity": "CRITICAL",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H",
            "version": "3.1"
          },
          "exploitabilityScore": 2.8,
          "impactScore": 6.0,
          "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "type": "Secondary"
        }
      ],
      "ssvcV203": [
        {
          "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "ssvcData": {
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            "options": [
              {
                "exploitation": "none"
              },
              {
                "automatable": "no"
              },
              {
                "technicalImpact": "total"
              }
            ],
            "role": "CISA Coordinator",
            "timestamp": "2026-09-22T15:25:58.982715Z",
            "version": "2.0.3"
          }
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      ]
    },
    "published": "2026-09-15T13:17:01.860",
    "references": [
      {
        "source": "security@mozilla.org",
        "tags": [
          "Permissions Required"
        ],
        "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=2061231"
      },
      {
        "source": "security@mozilla.org",
        "tags": [
          "Vendor Advisory"
        ],
        "url": "https://www.mozilla.org/security/advisories/mfsa2026-90/"
      },
      {
        "source": "security@mozilla.org",
        "tags": [
          "Vendor Advisory"
        ],
        "url": "https://www.mozilla.org/security/advisories/mfsa2026-93/"
      },
      {
        "source": "security@mozilla.org",
        "tags": [
          "Vendor Advisory"
        ],
        "url": "https://www.mozilla.org/security/advisories/mfsa2026-94/"
      },
      {
        "source": "security@mozilla.org",
        "tags": [
          "Vendor Advisory"
        ],
        "url": "https://www.mozilla.org/security/advisories/mfsa2026-96/"
      }
    ],
    "sourceIdentifier": "security@mozilla.org",
    "vulnStatus": "Analyzed",
    "weaknesses": [
      {
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          {
            "lang": "en",
            "value": "CWE-119"
          }
        ],
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
      }
    ]
  }
}

—

CVSS vector

cvss_vector

not compared

Red Hat

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:N/A:N

receipt

Source: Red Hat
Its words: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:N/A:N
Read by: field:cvss3_scoring_vector
Said since: 2026-10-06 13:01 UTC
Last answered: 2026-10-06 13:02 UTC
Original: open at the source

2026-10-06 13:01 UTC	CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:N/A:N
2026-09-29 09:44 UTC	—

What the source handed over

{
  "CVE": "CVE-2026-92071",
  "CWE": "CWE-501",
  "advisories": [],
  "affected_packages": [],
  "bugzilla": "2533733",
  "bugzilla_description": "firefox: thunderbird: Sandbox escape due to incorrect boundary conditions in the Widget: Win32 component",
  "cvss3_score": "3.4",
  "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:N/A:N",
  "cvss_score": null,
  "cvss_scoring_vector": null,
  "package_state": null,
  "public_date": "2026-09-15T12:34:33Z",
  "resource_url": "https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-92071.json",
  "severity": "low"
}

—

CWE

cwe

different words

NVD

CWE-119

receipt

Source: NVD
Its words: CWE-119
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 UTC	CWE-119
2026-09-29 09:45 UTC	—

What the source handed over

{
  "cve": {
    "affected": [
      {
        "affectedData": [
          {
            "product": "Firefox",
            "vendor": "Mozilla",
            "versions": [
              {
                "lessThanOrEqual": "153.*",
                "status": "unaffected",
                "version": "153.3",
                "versionType": "rpm"
              },
              {
                "lessThanOrEqual": "*",
                "status": "unaffected",
                "version": "156",
                "versionType": "rpm"
              }
            ]
          },
          {
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              },
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            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
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            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H",
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          },
          "exploitabilityScore": 2.8,
          "impactScore": 6.0,
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          "type": "Secondary"
        }
      ],
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      ]
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      },
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        "type": "Secondary"
      }
    ]
  }
}

—

CWE

cwe

different words

Red Hat

CWE-501

receipt

Source: Red Hat
Its words: CWE-501
Read by: field:CWE
Said since: 2026-09-29 09:44 UTC
Last answered: 2026-10-06 13:02 UTC
Original: open at the source

What the source handed over

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  "CVE": "CVE-2026-92071",
  "CWE": "CWE-501",
  "advisories": [],
  "affected_packages": [],
  "bugzilla": "2533733",
  "bugzilla_description": "firefox: thunderbird: Sandbox escape due to incorrect boundary conditions in the Widget: Win32 component",
  "cvss3_score": "3.4",
  "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:N/A:N",
  "cvss_score": null,
  "cvss_scoring_vector": null,
  "package_state": null,
  "public_date": "2026-09-15T12:34:33Z",
  "resource_url": "https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-92071.json",
  "severity": "low"
}

—

Exploitation

exploitation

NVD

none

No evidence of exploitation, and no public proof of concept.

receipt

Source: NVD
Its words: none
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 UTC	none
2026-09-29 09:45 UTC	—

What the source handed over

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            "vendor": "Mozilla",
            "versions": [
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                "status": "unaffected",
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                "versionType": "rpm"
              },
              {
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                "status": "unaffected",
                "version": "156",
                "versionType": "rpm"
              }
            ]
          },
          {
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              },
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}

—

Product

product

NVD

Firefox

receipt

Source: NVD
Its words: Firefox
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 UTC	Firefox
2026-09-29 09:45 UTC	—

What the source handed over

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          {
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            "vendor": "Mozilla",
            "versions": [
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                "status": "unaffected",
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                "versionType": "rpm"
              },
              {
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                "status": "unaffected",
                "version": "156",
                "versionType": "rpm"
              }
            ]
          },
          {
            "product": "Thunderbird",
            "vendor": "Mozilla",
            "versions": [
              {
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                "status": "unaffected",
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                "versionType": "rpm"
              },
              {
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                "status": "unaffected",
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                "versionType": "rpm"
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        "source": "security@mozilla.org"
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      },
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        "tags": [
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      {
        "source": "security@mozilla.org",
        "tags": [
          "Vendor Advisory"
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        "url": "https://www.mozilla.org/security/advisories/mfsa2026-96/"
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    ],
    "sourceIdentifier": "security@mozilla.org",
    "vulnStatus": "Analyzed",
    "weaknesses": [
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        "type": "Secondary"
      }
    ]
  }
}

—

Severity

severity

conflict

NVD

CRITICAL

From the CVSS base score at 9.0 and above.

receipt

Source: NVD
Its words: CRITICAL
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 UTC	CRITICAL
2026-09-29 09:45 UTC	—

What the source handed over

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            "vendor": "Mozilla",
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          {
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    "lastModified": "2026-10-05T19:40:32.353",
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      "ssvcV203": [
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        "source": "security@mozilla.org",
        "tags": [
          "Vendor Advisory"
        ],
        "url": "https://www.mozilla.org/security/advisories/mfsa2026-90/"
      },
      {
        "source": "security@mozilla.org",
        "tags": [
          "Vendor Advisory"
        ],
        "url": "https://www.mozilla.org/security/advisories/mfsa2026-93/"
      },
      {
        "source": "security@mozilla.org",
        "tags": [
          "Vendor Advisory"
        ],
        "url": "https://www.mozilla.org/security/advisories/mfsa2026-94/"
      },
      {
        "source": "security@mozilla.org",
        "tags": [
          "Vendor Advisory"
        ],
        "url": "https://www.mozilla.org/security/advisories/mfsa2026-96/"
      }
    ],
    "sourceIdentifier": "security@mozilla.org",
    "vulnStatus": "Analyzed",
    "weaknesses": [
      {
        "description": [
          {
            "lang": "en",
            "value": "CWE-119"
          }
        ],
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
      }
    ]
  }
}

critical

Severity

severity

conflict

Red Hat

low

A flaw that is unlikely to be exploited, or whose impact is minimal.

receipt

Source: Red Hat
Its words: low
Read by: field:severity
Said since: 2026-09-29 09:44 UTC
Last answered: 2026-10-06 13:02 UTC
Original: open at the source

What the source handed over

{
  "CVE": "CVE-2026-92071",
  "CWE": "CWE-501",
  "advisories": [],
  "affected_packages": [],
  "bugzilla": "2533733",
  "bugzilla_description": "firefox: thunderbird: Sandbox escape due to incorrect boundary conditions in the Widget: Win32 component",
  "cvss3_score": "3.4",
  "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:N/A:N",
  "cvss_score": null,
  "cvss_scoring_vector": null,
  "package_state": null,
  "public_date": "2026-09-15T12:34:33Z",
  "resource_url": "https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-92071.json",
  "severity": "low"
}

—

Status

status

NVD

Analyzed

receipt

Source: NVD
Its words: Analyzed
Read by: field:cve.vulnStatus
Said since: 2026-10-06 00:34 UTC
Last answered: 2026-10-06 12:41 UTC
Original: open at the source

2026-10-06 00:34 UTC	Analyzed
2026-09-29 09:45 UTC	Awaiting Analysis

What the source handed over

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            "vendor": "Mozilla",
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              },
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      "ssvcV203": [
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          "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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      {
        "source": "security@mozilla.org",
        "tags": [
          "Vendor Advisory"
        ],
        "url": "https://www.mozilla.org/security/advisories/mfsa2026-94/"
      },
      {
        "source": "security@mozilla.org",
        "tags": [
          "Vendor Advisory"
        ],
        "url": "https://www.mozilla.org/security/advisories/mfsa2026-96/"
      }
    ],
    "sourceIdentifier": "security@mozilla.org",
    "vulnStatus": "Analyzed",
    "weaknesses": [
      {
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        ],
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
      }
    ]
  }
}

—

Technical impact

technical_impact

NVD

total

The attacker gains full control of the component, or all of its information.

receipt

Source: NVD
Its words: total
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 UTC	total
2026-09-29 09:45 UTC	—

What the source handed over

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            "vendor": "Mozilla",
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                "versionType": "rpm"
              },
              {
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                "status": "unaffected",
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              }
            ]
          },
          {
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                "versionType": "rpm"
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                "status": "unaffected",
                "version": "156",
                "versionType": "rpm"
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            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H",
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          },
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          "impactScore": 6.0,
          "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "type": "Secondary"
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      ],
      "ssvcV203": [
        {
          "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "ssvcData": {
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            "options": [
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                "exploitation": "none"
              },
              {
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              },
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              }
            ],
            "role": "CISA Coordinator",
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    "published": "2026-09-15T13:17:01.860",
    "references": [
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        "tags": [
          "Permissions Required"
        ],
        "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=2061231"
      },
      {
        "source": "security@mozilla.org",
        "tags": [
          "Vendor Advisory"
        ],
        "url": "https://www.mozilla.org/security/advisories/mfsa2026-90/"
      },
      {
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        "tags": [
          "Vendor Advisory"
        ],
        "url": "https://www.mozilla.org/security/advisories/mfsa2026-93/"
      },
      {
        "source": "security@mozilla.org",
        "tags": [
          "Vendor Advisory"
        ],
        "url": "https://www.mozilla.org/security/advisories/mfsa2026-94/"
      },
      {
        "source": "security@mozilla.org",
        "tags": [
          "Vendor Advisory"
        ],
        "url": "https://www.mozilla.org/security/advisories/mfsa2026-96/"
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    ],
    "sourceIdentifier": "security@mozilla.org",
    "vulnStatus": "Analyzed",
    "weaknesses": [
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        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
      }
    ]
  }
}

—

Vendor

vendor

NVD

Mozilla

receipt

Source: NVD
Its words: Mozilla
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 UTC	Mozilla
2026-09-29 09:45 UTC	—

What the source handed over

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  "cve": {
    "affected": [
      {
        "affectedData": [
          {
            "product": "Firefox",
            "vendor": "Mozilla",
            "versions": [
              {
                "lessThanOrEqual": "153.*",
                "status": "unaffected",
                "version": "153.3",
                "versionType": "rpm"
              },
              {
                "lessThanOrEqual": "*",
                "status": "unaffected",
                "version": "156",
                "versionType": "rpm"
              }
            ]
          },
          {
            "product": "Thunderbird",
            "vendor": "Mozilla",
            "versions": [
              {
                "lessThanOrEqual": "153.*",
                "status": "unaffected",
                "version": "153.3",
                "versionType": "rpm"
              },
              {
                "lessThanOrEqual": "*",
                "status": "unaffected",
                "version": "156",
                "versionType": "rpm"
              }
            ]
          }
        ],
        "source": "security@mozilla.org"
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    ],
    "configurations": [
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    "cveTags": [],
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    "lastModified": "2026-10-05T19:40:32.353",
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            "userInteraction": "REQUIRED",
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      "ssvcV203": [
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          "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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        "tags": [
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        ],
        "url": "https://www.mozilla.org/security/advisories/mfsa2026-93/"
      },
      {
        "source": "security@mozilla.org",
        "tags": [
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        ],
        "url": "https://www.mozilla.org/security/advisories/mfsa2026-94/"
      },
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        "source": "security@mozilla.org",
        "tags": [
          "Vendor Advisory"
        ],
        "url": "https://www.mozilla.org/security/advisories/mfsa2026-96/"
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    ],
    "sourceIdentifier": "security@mozilla.org",
    "vulnStatus": "Analyzed",
    "weaknesses": [
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        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
      }
    ]
  }
}

—

Every claim, by kind

vulnerability

firefox: thunderbird: Sandbox escape due to incorrect boundary conditions in the Widget: Win32 component zetlyn/cve-redhat · 2026-09-15	cvss 3.4 cvss_vector CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:N/A:N cwe CWE-501 severity low	source
Sandbox escape due to incorrect boundary conditions in the Widget: Win32 component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3. zetlyn/cve-nvd · 2026-09-15	automatable no cvss 9.6 cvss_vector CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H cwe CWE-119 exploitation none product Firefox severity CRITICAL status Analyzed technical_impact total vendor Mozilla	source