Vulnerability Description
Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.10.0 until 0.11.0, the DELETE /api/v1/folders/{id} handler in backend/open_webui/routers/folders.py allowed a user granted write access to a shared chat folder to permanently delete chats and messages belonging to the folder owner. The cascade following the authorization check is bound to the folder owner's id, but the subfolder check accepted any inherited write grant instead of requiring ownership or administrator status. A collaborator can destroy the owner's subtree or force-move chats out of it when delete_contents=false. This issue is fixed in 0.11.0.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://github.com/open-webui/open-webui/commit/915ef7d0798d3175819cedbb2f62d7bf
- https://github.com/open-webui/open-webui/pull/27003
- https://github.com/open-webui/open-webui/releases/tag/v0.11.0
- https://github.com/open-webui/open-webui/security/advisories/GHSA-3cg5-48j3-v4gv
FAQ
What is CVE-2026-70494?
CVE-2026-70494 is a vulnerability with a CVSS score of 8.1 (HIGH). Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.10.0 until 0.11.0, the DELETE /api/v1/folders/{id} handler in backend/open_webui/routers/folders.py allowed...
How severe is CVE-2026-70494?
CVE-2026-70494 has been rated HIGH with a CVSS base score of 8.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-70494?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.