{"data":{"id":"d188bb48-ffcc-4892-9a1c-c6ddde3a783e","title":"GHSA-vvxm-vxmr-624h: Open WebUI vulnerable to Path Traversal in `POST /api/v1/audio/transcriptions`","summary":"An unsanitised filename field in the Open WebUI speech-to-text endpoint `POST /api/v1/audio/transcriptions` lets any authenticated non-admin user trigger a `FileNotFoundError`. The error message, including the server's absolute `DATA_DIR` path, is returned verbatim in the HTTP 400 response body. The source says this confirms information disclosure on all default deployments.","solution":"Recommended fix in the source: in `backend/open_webui/routers/audio.py`, sanitise the extension with `Path(file.filename).name` and `Path(safe_name).suffix.lstrip(\".\") or \"bin\"` at line 1197, and at line 1231 replace the error detail with a generic message (\"Transcription failed.\") instead of the exception text.","labels":["security","privacy"],"sourceUrl":"https://github.com/advisories/GHSA-vvxm-vxmr-624h","publishedAt":"2026-03-27T15:29:32.000Z","cveId":"CVE-2026-28786","cweIds":null,"cvssScore":null,"cvssSeverity":"medium","severity":"medium","attackType":["other"],"issueType":"vulnerability","affectedPackages":["open-webui@< 0.8.6 (fixed: 0.8.6)"],"affectedPackageNames":["open-webui"],"affectedPackageRefs":["pypi:open-webui"],"affectedVendors":[],"affectedVendorsRaw":["Open WebUI"],"classifierModel":"claude-haiku-5-5","classifierPromptVersion":"v4","summaryPromptVersion":"v2","headline":null,"headlinePromptVersion":null,"cvssVector":null,"attackVector":null,"attackComplexity":null,"privilegesRequired":null,"userInteraction":null,"exploitMaturity":"unknown","epssScore":0.00571,"epssCheckedAt":"2026-11-10T00:11:23.585Z","kevDateAdded":null,"advisoryAliases":["GHSA-vvxm-vxmr-624h"],"affectedPackagesSource":null,"affectedPackagesCheckedAt":null,"patchAvailable":true,"disclosureDate":"2026-03-27T15:29:32.000Z","fixReleasedAt":"2026-03-01T21:09:40.090Z","daysToFix":-26,"fixCheckedAt":"2026-10-29T21:39:25.929Z","capecIds":null,"crossRefCount":0,"attackSophistication":"trivial","impactType":["confidentiality"],"aiComponentTargeted":"api","llmSpecific":false,"classifierConfidence":0.9,"researchCategory":null,"atlasIds":null,"fixes":[{"ecosystem":"pypi","name":"open-webui","fixedVersion":"0.8.6","matchedVersion":"0.8.6","fixReleasedAt":"2026-03-01T21:09:40.090Z","daysToFix":-26,"match":"ecosystem","source":"tracked","status":"found","checkedAt":"2026-10-29T21:39:25.784Z"}]}}