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CVE-2026-45671

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.0, any authenticated user can permanently delete files owned by other users via DELETE /api/v1/files/{id} when the target file is referenced in any shared chat. The has_access_to_file() authorization gate unconditionally grants access through its shared-chat branch. It checks neither the requesting user's identity nor the type of operation being performed. File UUIDs (which would other
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:5ccf9d4c0d4c65c7a164bb373f0beaa0abc6b9ad905ce3179e977317bb75011d
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"open-webui","vendor":"open-webui","versions":[{"status":"affected","version":"< 0.9.0"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:f210b9f84e1548ed4537e3dfa6ac664f4661d0a3a5bab1abc1083ff6170e2021 · sha256:90f415299de4ce0d… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":8,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:f210b9f84e1548ed4537e3dfa6ac664f4661d0a3a5bab1abc1083ff6170e2021 · sha256:90f415299de4ce0d… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-639","description":"CWE-639: Authorization Bypass Through User-Controlled Key","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:f210b9f84e1548ed4537e3dfa6ac664f4661d0a3a5bab1abc1083ff6170e2021 · sha256:90f415299de4ce0d… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions
{"tags":["exploit"],"url":"https://github.com/open-webui/open-webui/security/advisories/GHSA-26g9-27vm-x3q8"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:f210b9f84e1548ed4537e3dfa6ac664f4661d0a3a5bab1abc1083ff6170e2021 · sha256:90f415299de4ce0d… · /containers/adp/0/references/0
{"name":"https://github.com/open-webui/open-webui/security/advisories/GHSA-26g9-27vm-x3q8","tags":["x_refsource_CONFIRM"],"url":"https://github.com/open-webui/open-webui/security/advisories/GHSA-26g9-27vm-x3q8"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:f210b9f84e1548ed4537e3dfa6ac664f4661d0a3a5bab1abc1083ff6170e2021 · sha256:90f415299de4ce0d… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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