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CVE-2026-44555

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.0, Open WebUI supports model composition via base_model_id: a user-defined model (e.g., "Cheap Assistant") can reference an existing base model (e.g., "gpt-4-turbo-restricted") that provides the actual inference capability. When a user queries the composed model, the access control pipeline verifies the user has access to the composed model but never re-verifies access to the chained b
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:9ccbbfabba694159f0265a00ca2b5896460176ff840a9474696b0e717362f9ec
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:v2:80bf5c20ea8bcd6fc8bb5d487e340a44d3c6c10ed6fcb6b78cf03e898a19487f · sha256:b7b152d312ecf810… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":7.6,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"LOW","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:80bf5c20ea8bcd6fc8bb5d487e340a44d3c6c10ed6fcb6b78cf03e898a19487f · sha256:b7b152d312ecf810… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-862","description":"CWE-862: Missing Authorization","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:80bf5c20ea8bcd6fc8bb5d487e340a44d3c6c10ed6fcb6b78cf03e898a19487f · sha256:b7b152d312ecf810… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions
{"tags":["exploit"],"url":"https://github.com/open-webui/open-webui/security/advisories/GHSA-9vvh-qmjx-p4q8"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:80bf5c20ea8bcd6fc8bb5d487e340a44d3c6c10ed6fcb6b78cf03e898a19487f · sha256:b7b152d312ecf810… · /containers/adp/0/references/0
{"name":"https://github.com/open-webui/open-webui/security/advisories/GHSA-9vvh-qmjx-p4q8","tags":["x_refsource_CONFIRM"],"url":"https://github.com/open-webui/open-webui/security/advisories/GHSA-9vvh-qmjx-p4q8"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:80bf5c20ea8bcd6fc8bb5d487e340a44d3c6c10ed6fcb6b78cf03e898a19487f · sha256:b7b152d312ecf810… · /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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