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CVE-2026-45666

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.8.11, the API /api/v1/notes/{note_id} endpoint lacks proper authorization checks, allowing authenticated users to retrieve notes belonging to other users by guessing or enumerating UUIDs. This results in unauthorized disclosure of potentially sensitive or private user data. This vulnerability is fixed in 0.8.11.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:4e876ca52524b883da4187a1679063a3fe39ba425bd6ea02725431630f4a4fdc
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":"< 0.8.11"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:274bec43f31b7bf67e0be666f47f2d2be9aea9d9e00e7993e348081776cb8092 · sha256:f477da35e42ef571… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":6.5,"baseSeverity":"MEDIUM","confidentialityImpact":"HIGH","integrityImpact":"NONE","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:274bec43f31b7bf67e0be666f47f2d2be9aea9d9e00e7993e348081776cb8092 · sha256:f477da35e42ef571… · /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:v2:274bec43f31b7bf67e0be666f47f2d2be9aea9d9e00e7993e348081776cb8092 · sha256:f477da35e42ef571… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions
{"tags":["exploit"],"url":"https://github.com/open-webui/open-webui/security/advisories/GHSA-x3qm-p8hr-3c3h"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:274bec43f31b7bf67e0be666f47f2d2be9aea9d9e00e7993e348081776cb8092 · sha256:f477da35e42ef571… · /containers/adp/0/references/0
{"name":"https://github.com/open-webui/open-webui/security/advisories/GHSA-x3qm-p8hr-3c3h","tags":["x_refsource_CONFIRM"],"url":"https://github.com/open-webui/open-webui/security/advisories/GHSA-x3qm-p8hr-3c3h"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:274bec43f31b7bf67e0be666f47f2d2be9aea9d9e00e7993e348081776cb8092 · sha256:f477da35e42ef571… · /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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