{"id":"CVE-2026-70491","title":"Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform","summary":"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 r…","severity":"medium","cvss":6.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","cwe":["CWE-200"],"vendor":"openwebui","product":"open_webui","affected":["open_webui < 0.11.0"],"patched":["open_webui 0.11.0"],"published":"2026-08-04","updated":"2026-09-18","sourceUpdated":"2026-09-18T14:47:15.447","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-70491","references":[{"url":"https://github.com/open-webui/open-webui/commit/c05de13b4fca1ac8a17153782b46b3d0aacf491c","label":"security-advisories@github.com"},{"url":"https://github.com/open-webui/open-webui/pull/27005","label":"security-advisories@github.com"},{"url":"https://github.com/open-webui/open-webui/releases/tag/v0.11.0","label":"security-advisories@github.com"},{"url":"https://github.com/open-webui/open-webui/security/advisories/GHSA-3r7g-q6cg-q2vx","label":"security-advisories@github.com"},{"url":"https://github.com/open-webui/open-webui/security/advisories/GHSA-3r7g-q6cg-q2vx","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"},{"url":"https://github.com/advisories/GHSA-3r7g-q6cg-q2vx"}],"tags":["nvd","ghsa","pip"],"epss":0.00275,"epssPercentile":0.20078,"aliases":["GHSA-3r7g-q6cg-q2vx"],"ecosystem":"pip","ingestedAt":"2026-08-04T21:42:19.669Z","slug":"CVE-2026-70491","body":"## Overview\n\nOpen 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.\n\n## Affected\n\n- `open_webui < 0.11.0`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `open_webui 0.11.0`\n\n## Package advisory (CVE-2026-70491)\n\nAffected packages:\n\n- `open-webui <= 0.10.2`\n\nPatched in:\n\n- `open-webui 0.11.0`\n\nSource: https://github.com/advisories/GHSA-3r7g-q6cg-q2vx","depth":"sunlit","depthScore":36,"depthScoreParts":{"impact":35.8,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}