{"cve":"CVE-2026-70491","nvd":{"published":"2026-08-04T21:16:38.050","modified":"2026-09-18T14:47:15.447","status":"Analyzed","description":"Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. In 0.10.2 and earlier, the GET /api/v1/tools/, GET /api/v1/tools/list, and GET /api/v1/tools/id/{id} endpoints in backend/open_webui/routers/tools.py returned full Python tool source to authenticated non-admin read-only users. ToolResponse deliberately omitted source and specs, but ToolUserResponse permitted extra fields and handlers spread a full tool model dump into the response, re-admitting omitted fields. A non-admin with a read grant can obtain another user's server-side tool source, which commonly embeds hard-coded API keys, credentials, and internal service URLs. This issue is fixed in 0.11.0.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","score":6.5},"cwes":["CWE-200"],"references":["https://github.com/open-webui/open-webui/commit/c05de13b4fca1ac8a17153782b46b3d0aacf491c","https://github.com/open-webui/open-webui/pull/27005","https://github.com/open-webui/open-webui/releases/tag/v0.11.0","https://github.com/open-webui/open-webui/security/advisories/GHSA-3r7g-q6cg-q2vx","https://github.com/open-webui/open-webui/security/advisories/GHSA-3r7g-q6cg-q2vx"],"products":["openwebui:open_webui"],"source":"nvd","synced_at":"2026-10-19T22:47:10.050265369+00:00"},"epss":{"cve":"CVE-2026-70491","score":0.00478,"percentile":0.41274,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-3r7g-q6cg-q2vx","url":"https://osv.dev/vulnerability/GHSA-3r7g-q6cg-q2vx","summary":"Open WebUI: Tool source code disclosed to read-only users via the tool list and get endpoints","modified":"2026-08-10T11:40:31.158190468Z","packages":[{"ecosystem":"PyPI","name":"open-webui","purl":"pkg:pypi/open-webui","ranges":["<0.11.0"],"fixed":["0.11.0"]}]},{"id":"PYSEC-2026-3639","url":"https://osv.dev/vulnerability/PYSEC-2026-3639","summary":"Open WebUI: Tool source code disclosed to read-only users via the tool list and get endpoints","modified":"2026-08-10T11:30:14.176758153Z","packages":[{"ecosystem":"PyPI","name":"open-webui","purl":"pkg:pypi/open-webui","ranges":["<0.11.0"],"fixed":["0.11.0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}