{"data":{"id":"4fb54f8e-82d4-4fdc-8335-045e4d6c3025","title":"GHSA-57q6-fvp4-pqmm: Open WebUI's API key endpoint restrictions bypassed via `x-api-key` header — full message processing on restricted endpoints","summary":"Open WebUI has a security flaw where API key restrictions can be bypassed by using the `x-api-key` header (a custom header for authentication) instead of the standard `Authorization` header. An admin can restrict what endpoints an API key can access, but the same key sent via `x-api-key` bypasses these restrictions entirely and allows full access to protected endpoints like the messages API.","solution":"N/A -- no mitigation discussed in source.","labels":["security"],"sourceUrl":"https://github.com/advisories/GHSA-57q6-fvp4-pqmm","publishedAt":"2026-05-14T20:21:26.000Z","cveId":"CVE-2026-45339","cweIds":null,"cvssScore":null,"cvssSeverity":"medium","severity":"medium","attackType":["other"],"issueType":"vulnerability","affectedPackages":["open-webu@<= 0.8.12 (fixed: 0.9.0)"],"affectedVendors":[],"affectedVendorsRaw":["Open WebUI"],"classifierModel":"claude-haiku-4-5-20251001","classifierPromptVersion":"v3","cvssVector":null,"attackVector":null,"attackComplexity":null,"privilegesRequired":null,"userInteraction":null,"exploitMaturity":"unknown","epssScore":0,"patchAvailable":true,"disclosureDate":"2026-05-14T20:21:26.000Z","capecIds":null,"crossRefCount":0,"attackSophistication":"trivial","impactType":["integrity","confidentiality"],"aiComponentTargeted":"api","llmSpecific":false,"classifierConfidence":0.95,"researchCategory":null,"atlasIds":null}}