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Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.10.0 until 0.11.1, POST /api/chat/completions a…

cve CVE-2026-87997 1 source, 1 claim · Watch

NVD writes:
Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.10.0 until 0.11.1, POST /api/chat/completions and POST /api/v1/chat/completions in backend/open_webui/main.py copied a client-supplied folder_id into a new chat without applying the folder write-access check used by the dedicated chat routes. An authenticated user who knew a shared folder identifier could inject an attacker-controlled chat into a folder where the user had read-only or no write access, causing the entry to appear to authorized folder readers. This issue is fixed in version 0.11.1. the claim
Severity
MEDIUM NVD
CVSS
4.3 NVD
Vendor
open-webui NVD
Product
open-webui NVD
CWE
CWE-639, 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

2026-09-09first spoke of it: Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.10.0 until 0.11.1, POST /api/chat/completions and POST /api/v1/chat/completions in backend/open_webui/main.py copied a client-supplied folder_id into a new chat without applying the folder write-access check used by the dedicated chat routes. An authenticated user who knew a shared folder identifier could inject an attacker-controlled chat into a folder where the user had read-only or no write access, causing the entry to appear to authorized folder readers. This issue is fixed in version 0.11.1.NVD

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.10.0 until 0.11.1, POST /api/chat/completions and POST /api/v1/chat/completions in backend/open_webui/main.py copied a client-supplied folder_id into a new chat without applying the folder write-access check used by the dedicated chat routes. An authenticated user who knew a shared folder identifier could inject an attacker-controlled chat into a folder where the user had read-only or no write access, causing the entry to appear to authorized folder readers. This issue is fixed in version 0.11.1.

What it is to other things

affectsopenwebui/open_webui
NVD
made_byopenwebui
NVD

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

made_byopen_webui
NVD says “open-webui”
affectsopen_webui/open_webui
NVD says “open-webui · open-webui”
Every value, with what each source said and its receipt
PropertySourceSaidMeans here
Automatable
automatable
NVDno
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 UTCno
2026-09-29 09:45 UTC—
What the source handed over
{
  "cve": {
    "affected": [
      {
        "affectedData": [
          {
            "product": "open-webui",
            "vendor": "open-webui",
            "versions": [
              {
                "status": "affected",
                "version": ">= 0.10.0, < 0.11.1"
              }
            ]
          }
        ],
        "source": "security-advisories@github.com"
      }
    ],
    "configurations": [
      {
        "nodes": [
          {
            "cpeMatch": [
              {
                "criteria": "cpe:2.3:a:openwebui:open_webui:*:*:*:*:*:*:*:*",
                "matchCriteriaId": "9FA5514D-3F5D-4716-B12A-45ABA81E74DE",
                "versionEndExcluding": "0.11.1",
                "versionStartIncluding": "0.10.0",
                "vulnerable": true
              }
            ],
            "negate": false,
            "operator": "OR"
          }
        ]
      }
    ],
    "cveTags": [],
    "descriptions": [
      {
        "lang": "en",
        "value": "Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.10.0 until 0.11.1, POST /api/chat/completions and POST /api/v1/chat/completions in backend/open_webui/main.py copied a client-supplied folder_id into a new chat without applying the folder write-access check used by the dedicated chat routes. An authenticated user who knew a shared folder identifier could inject an attacker-controlled chat into a folder where the user had read-only or no write access, causing the entry to appear to authorized folder readers. This issue is fixed in version 0.11.1."
      }
    ],
    "id": "CVE-2026-87997",
    "lastModified": "2026-09-16T15:14:39.770",
    "metrics": {
      "cvssMetricV31": [
        {
          "cvssData": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 4.3,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "LOW",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N",
            "version": "3.1"
          },
          "exploitabilityScore": 2.8,
          "impactScore": 1.4,
          "source": "security-advisories@github.com",
          "type": "Secondary"
        }
      ],
      "ssvcV203": [
        {
          "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "ssvcData": {
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            "options": [
              {
                "exploitation": "poc"
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              {
                "automatable": "no"
              },
              {
                "technicalImpact": "partial"
              }
            ],
            "role": "CISA Coordinator",
            "timestamp": "2026-09-14T13:43:57.477520Z",
            "version": "2.0.3"
          }
        }
      ]
    },
    "published": "2026-09-09T22:18:48.267",
    "references": [
      {
        "source": "security-advisories@github.com",
        "tags": [
          "Patch"
        ],
        "url": "https://github.com/open-webui/open-webui/commit/d9e23b90c100d19b00270aea3cde0501d2354a6c"
      },
      {
        "source": "security-advisories@github.com",
        "tags": [
          "Issue Tracking",
          "Patch"
        ],
        "url": "https://github.com/open-webui/open-webui/pull/28366"
      },
      {
        "source": "security-advisories@github.com",
        "tags": [
          "Release Notes"
        ],
        "url": "https://github.com/open-webui/open-webui/releases/tag/v0.11.1"
      },
      {
        "source": "security-advisories@github.com",
        "tags": [
          "Exploit",
          "Vendor Advisory"
        ],
        "url": "https://github.com/open-webui/open-webui/security/advisories/GHSA-3pf7-q2g3-wj28"
      },
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "tags": [
          "Exploit",
          "Vendor Advisory"
        ],
        "url": "https://github.com/open-webui/open-webui/security/advisories/GHSA-3pf7-q2g3-wj28"
      }
    ],
    "sourceIdentifier": "security-advisories@github.com",
    "vulnStatus": "Analyzed",
    "weaknesses": [
      {
        "description": [
          {
            "lang": "en",
            "value": "CWE-639"
          },
          {
            "lang": "en",
            "value": "CWE-862"
          }
        ],
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ]
  }
}
—
CVSS
cvss
NVD4.3
receipt
Source
NVD
Its words
4.3
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": "open-webui",
            "vendor": "open-webui",
            "versions": [
              {
                "status": "affected",
                "version": ">= 0.10.0, < 0.11.1"
              }
            ]
          }
        ],
        "source": "security-advisories@github.com"
      }
    ],
    "configurations": [
      {
        "nodes": [
          {
            "cpeMatch": [
              {
                "criteria": "cpe:2.3:a:openwebui:open_webui:*:*:*:*:*:*:*:*",
                "matchCriteriaId": "9FA5514D-3F5D-4716-B12A-45ABA81E74DE",
                "versionEndExcluding": "0.11.1",
                "versionStartIncluding": "0.10.0",
                "vulnerable": true
              }
            ],
            "negate": false,
            "operator": "OR"
          }
        ]
      }
    ],
    "cveTags": [],
    "descriptions": [
      {
        "lang": "en",
        "value": "Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.10.0 until 0.11.1, POST /api/chat/completions and POST /api/v1/chat/completions in backend/open_webui/main.py copied a client-supplied folder_id into a new chat without applying the folder write-access check used by the dedicated chat routes. An authenticated user who knew a shared folder identifier could inject an attacker-controlled chat into a folder where the user had read-only or no write access, causing the entry to appear to authorized folder readers. This issue is fixed in version 0.11.1."
      }
    ],
    "id": "CVE-2026-87997",
    "lastModified": "2026-09-16T15:14:39.770",
    "metrics": {
      "cvssMetricV31": [
        {
          "cvssData": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 4.3,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "LOW",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N",
            "version": "3.1"
          },
          "exploitabilityScore": 2.8,
          "impactScore": 1.4,
          "source": "security-advisories@github.com",
          "type": "Secondary"
        }
      ],
      "ssvcV203": [
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                "automatable": "no"
              },
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                "technicalImpact": "partial"
              }
            ],
            "role": "CISA Coordinator",
            "timestamp": "2026-09-14T13:43:57.477520Z",
            "version": "2.0.3"
          }
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    "published": "2026-09-09T22:18:48.267",
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        "url": "https://github.com/open-webui/open-webui/pull/28366"
      },
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        "source": "security-advisories@github.com",
        "tags": [
          "Release Notes"
        ],
        "url": "https://github.com/open-webui/open-webui/releases/tag/v0.11.1"
      },
      {
        "source": "security-advisories@github.com",
        "tags": [
          "Exploit",
          "Vendor Advisory"
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        "url": "https://github.com/open-webui/open-webui/security/advisories/GHSA-3pf7-q2g3-wj28"
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      }
    ],
    "sourceIdentifier": "security-advisories@github.com",
    "vulnStatus": "Analyzed",
    "weaknesses": [
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          {
            "lang": "en",
            "value": "CWE-862"
          }
        ],
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ]
  }
}
—
CVSS vector
cvss_vector
NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
receipt
Source
NVD
Its words
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/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:L/UI:N/S:U/C:N/I:L/A:N
2026-09-29 09:45 UTC—
What the source handed over
{
  "cve": {
    "affected": [
      {
        "affectedData": [
          {
            "product": "open-webui",
            "vendor": "open-webui",
            "versions": [
              {
                "status": "affected",
                "version": ">= 0.10.0, < 0.11.1"
              }
            ]
          }
        ],
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      }
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              }
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            "operator": "OR"
          }
        ]
      }
    ],
    "cveTags": [],
    "descriptions": [
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        "value": "Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.10.0 until 0.11.1, POST /api/chat/completions and POST /api/v1/chat/completions in backend/open_webui/main.py copied a client-supplied folder_id into a new chat without applying the folder write-access check used by the dedicated chat routes. An authenticated user who knew a shared folder identifier could inject an attacker-controlled chat into a folder where the user had read-only or no write access, causing the entry to appear to authorized folder readers. This issue is fixed in version 0.11.1."
      }
    ],
    "id": "CVE-2026-87997",
    "lastModified": "2026-09-16T15:14:39.770",
    "metrics": {
      "cvssMetricV31": [
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          "cvssData": {
            "attackComplexity": "LOW",
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            "availabilityImpact": "NONE",
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            "confidentialityImpact": "NONE",
            "integrityImpact": "LOW",
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            "scope": "UNCHANGED",
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      },
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      },
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        "tags": [
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      },
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        "tags": [
          "Exploit",
          "Vendor Advisory"
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      },
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          "Exploit",
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      }
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    "vulnStatus": "Analyzed",
    "weaknesses": [
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        "description": [
          {
            "lang": "en",
            "value": "CWE-639"
          },
          {
            "lang": "en",
            "value": "CWE-862"
          }
        ],
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ]
  }
}
—
CWE
cwe
NVDCWE-639, CWE-862
receipt
Source
NVD
Its words
CWE-639, 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-639, CWE-862
2026-09-29 09:45 UTC—
What the source handed over
{
  "cve": {
    "affected": [
      {
        "affectedData": [
          {
            "product": "open-webui",
            "vendor": "open-webui",
            "versions": [
              {
                "status": "affected",
                "version": ">= 0.10.0, < 0.11.1"
              }
            ]
          }
        ],
        "source": "security-advisories@github.com"
      }
    ],
    "configurations": [
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          {
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                "matchCriteriaId": "9FA5514D-3F5D-4716-B12A-45ABA81E74DE",
                "versionEndExcluding": "0.11.1",
                "versionStartIncluding": "0.10.0",
                "vulnerable": true
              }
            ],
            "negate": false,
            "operator": "OR"
          }
        ]
      }
    ],
    "cveTags": [],
    "descriptions": [
      {
        "lang": "en",
        "value": "Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.10.0 until 0.11.1, POST /api/chat/completions and POST /api/v1/chat/completions in backend/open_webui/main.py copied a client-supplied folder_id into a new chat without applying the folder write-access check used by the dedicated chat routes. An authenticated user who knew a shared folder identifier could inject an attacker-controlled chat into a folder where the user had read-only or no write access, causing the entry to appear to authorized folder readers. This issue is fixed in version 0.11.1."
      }
    ],
    "id": "CVE-2026-87997",
    "lastModified": "2026-09-16T15:14:39.770",
    "metrics": {
      "cvssMetricV31": [
        {
          "cvssData": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 4.3,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "LOW",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N",
            "version": "3.1"
          },
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          "impactScore": 1.4,
          "source": "security-advisories@github.com",
          "type": "Secondary"
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              },
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                "technicalImpact": "partial"
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            ],
            "role": "CISA Coordinator",
            "timestamp": "2026-09-14T13:43:57.477520Z",
            "version": "2.0.3"
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        }
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    "published": "2026-09-09T22:18:48.267",
    "references": [
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          "Patch"
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      },
      {
        "source": "security-advisories@github.com",
        "tags": [
          "Release Notes"
        ],
        "url": "https://github.com/open-webui/open-webui/releases/tag/v0.11.1"
      },
      {
        "source": "security-advisories@github.com",
        "tags": [
          "Exploit",
          "Vendor Advisory"
        ],
        "url": "https://github.com/open-webui/open-webui/security/advisories/GHSA-3pf7-q2g3-wj28"
      },
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "tags": [
          "Exploit",
          "Vendor Advisory"
        ],
        "url": "https://github.com/open-webui/open-webui/security/advisories/GHSA-3pf7-q2g3-wj28"
      }
    ],
    "sourceIdentifier": "security-advisories@github.com",
    "vulnStatus": "Analyzed",
    "weaknesses": [
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            "lang": "en",
            "value": "CWE-639"
          },
          {
            "lang": "en",
            "value": "CWE-862"
          }
        ],
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      }
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}
—
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
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—
Product
product
NVDopen-webui
receipt
Source
NVD
Its words
open-webui
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 UTCopen-webui
2026-09-29 09:45 UTC—
What the source handed over
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    "affected": [
      {
        "affectedData": [
          {
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    ],
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    "lastModified": "2026-09-16T15:14:39.770",
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            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
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        ],
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        "type": "Secondary"
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}
—
Severity
severity
NVDMEDIUM
From 4.0 to 6.9.
receipt
Source
NVD
Its words
MEDIUM
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 UTCMEDIUM
2026-09-29 09:45 UTC—
What the source handed over
{
  "cve": {
    "affected": [
      {
        "affectedData": [
          {
            "product": "open-webui",
            "vendor": "open-webui",
            "versions": [
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      }
    ],
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      }
    ],
    "id": "CVE-2026-87997",
    "lastModified": "2026-09-16T15:14:39.770",
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    ],
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        ],
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ]
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}
medium
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
{
  "cve": {
    "affected": [
      {
        "affectedData": [
          {
            "product": "open-webui",
            "vendor": "open-webui",
            "versions": [
              {
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    ],
    "cveTags": [],
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      }
    ],
    "id": "CVE-2026-87997",
    "lastModified": "2026-09-16T15:14:39.770",
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      "cvssMetricV31": [
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            "integrityImpact": "LOW",
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            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N",
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}
—
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
{
  "cve": {
    "affected": [
      {
        "affectedData": [
          {
            "product": "open-webui",
            "vendor": "open-webui",
            "versions": [
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        ],
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      }
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                "versionEndExcluding": "0.11.1",
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                "vulnerable": true
              }
            ],
            "negate": false,
            "operator": "OR"
          }
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    ],
    "cveTags": [],
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    ],
    "id": "CVE-2026-87997",
    "lastModified": "2026-09-16T15:14:39.770",
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            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "LOW",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N",
            "version": "3.1"
          },
          "exploitabilityScore": 2.8,
          "impactScore": 1.4,
          "source": "security-advisories@github.com",
          "type": "Secondary"
        }
      ],
      "ssvcV203": [
        {
          "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "ssvcData": {
            "id": "CVE-2026-87997",
            "options": [
              {
                "exploitation": "poc"
              },
              {
                "automatable": "no"
              },
              {
                "technicalImpact": "partial"
              }
            ],
            "role": "CISA Coordinator",
            "timestamp": "2026-09-14T13:43:57.477520Z",
            "version": "2.0.3"
          }
        }
      ]
    },
    "published": "2026-09-09T22:18:48.267",
    "references": [
      {
        "source": "security-advisories@github.com",
        "tags": [
          "Patch"
        ],
        "url": "https://github.com/open-webui/open-webui/commit/d9e23b90c100d19b00270aea3cde0501d2354a6c"
      },
      {
        "source": "security-advisories@github.com",
        "tags": [
          "Issue Tracking",
          "Patch"
        ],
        "url": "https://github.com/open-webui/open-webui/pull/28366"
      },
      {
        "source": "security-advisories@github.com",
        "tags": [
          "Release Notes"
        ],
        "url": "https://github.com/open-webui/open-webui/releases/tag/v0.11.1"
      },
      {
        "source": "security-advisories@github.com",
        "tags": [
          "Exploit",
          "Vendor Advisory"
        ],
        "url": "https://github.com/open-webui/open-webui/security/advisories/GHSA-3pf7-q2g3-wj28"
      },
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "tags": [
          "Exploit",
          "Vendor Advisory"
        ],
        "url": "https://github.com/open-webui/open-webui/security/advisories/GHSA-3pf7-q2g3-wj28"
      }
    ],
    "sourceIdentifier": "security-advisories@github.com",
    "vulnStatus": "Analyzed",
    "weaknesses": [
      {
        "description": [
          {
            "lang": "en",
            "value": "CWE-639"
          },
          {
            "lang": "en",
            "value": "CWE-862"
          }
        ],
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ]
  }
}
—
Vendor
vendor
NVDopen-webui
receipt
Source
NVD
Its words
open-webui
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 UTCopen-webui
2026-09-29 09:45 UTC—
What the source handed over
{
  "cve": {
    "affected": [
      {
        "affectedData": [
          {
            "product": "open-webui",
            "vendor": "open-webui",
            "versions": [
              {
                "status": "affected",
                "version": ">= 0.10.0, < 0.11.1"
              }
            ]
          }
        ],
        "source": "security-advisories@github.com"
      }
    ],
    "configurations": [
      {
        "nodes": [
          {
            "cpeMatch": [
              {
                "criteria": "cpe:2.3:a:openwebui:open_webui:*:*:*:*:*:*:*:*",
                "matchCriteriaId": "9FA5514D-3F5D-4716-B12A-45ABA81E74DE",
                "versionEndExcluding": "0.11.1",
                "versionStartIncluding": "0.10.0",
                "vulnerable": true
              }
            ],
            "negate": false,
            "operator": "OR"
          }
        ]
      }
    ],
    "cveTags": [],
    "descriptions": [
      {
        "lang": "en",
        "value": "Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.10.0 until 0.11.1, POST /api/chat/completions and POST /api/v1/chat/completions in backend/open_webui/main.py copied a client-supplied folder_id into a new chat without applying the folder write-access check used by the dedicated chat routes. An authenticated user who knew a shared folder identifier could inject an attacker-controlled chat into a folder where the user had read-only or no write access, causing the entry to appear to authorized folder readers. This issue is fixed in version 0.11.1."
      }
    ],
    "id": "CVE-2026-87997",
    "lastModified": "2026-09-16T15:14:39.770",
    "metrics": {
      "cvssMetricV31": [
        {
          "cvssData": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 4.3,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "LOW",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N",
            "version": "3.1"
          },
          "exploitabilityScore": 2.8,
          "impactScore": 1.4,
          "source": "security-advisories@github.com",
          "type": "Secondary"
        }
      ],
      "ssvcV203": [
        {
          "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "ssvcData": {
            "id": "CVE-2026-87997",
            "options": [
              {
                "exploitation": "poc"
              },
              {
                "automatable": "no"
              },
              {
                "technicalImpact": "partial"
              }
            ],
            "role": "CISA Coordinator",
            "timestamp": "2026-09-14T13:43:57.477520Z",
            "version": "2.0.3"
          }
        }
      ]
    },
    "published": "2026-09-09T22:18:48.267",
    "references": [
      {
        "source": "security-advisories@github.com",
        "tags": [
          "Patch"
        ],
        "url": "https://github.com/open-webui/open-webui/commit/d9e23b90c100d19b00270aea3cde0501d2354a6c"
      },
      {
        "source": "security-advisories@github.com",
        "tags": [
          "Issue Tracking",
          "Patch"
        ],
        "url": "https://github.com/open-webui/open-webui/pull/28366"
      },
      {
        "source": "security-advisories@github.com",
        "tags": [
          "Release Notes"
        ],
        "url": "https://github.com/open-webui/open-webui/releases/tag/v0.11.1"
      },
      {
        "source": "security-advisories@github.com",
        "tags": [
          "Exploit",
          "Vendor Advisory"
        ],
        "url": "https://github.com/open-webui/open-webui/security/advisories/GHSA-3pf7-q2g3-wj28"
      },
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "tags": [
          "Exploit",
          "Vendor Advisory"
        ],
        "url": "https://github.com/open-webui/open-webui/security/advisories/GHSA-3pf7-q2g3-wj28"
      }
    ],
    "sourceIdentifier": "security-advisories@github.com",
    "vulnStatus": "Analyzed",
    "weaknesses": [
      {
        "description": [
          {
            "lang": "en",
            "value": "CWE-639"
          },
          {
            "lang": "en",
            "value": "CWE-862"
          }
        ],
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ]
  }
}
—
Every claim, by kind

vulnerability

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.10.0 until 0.11.1, POST /api/chat/completions and POST /api/v1/chat/completions in backend/open_webui/main.py copied a client-supplied folder_id into a new chat without applying the folder write-access check used by the dedicated chat routes. An authenticated user who knew a shared folder identifier could inject an attacker-controlled chat into a folder where the user had read-only or no write access, causing the entry to appear to authorized folder readers. This issue is fixed in version 0.11.1.
zetlyn/cve-nvd · 2026-09-09
automatable no cvss 4.3 cvss_vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N cwe CWE-639, CWE-862 exploitation poc product open-webui severity MEDIUM status Analyzed technical_impact partial vendor open-webui source