Vulnerability Description
Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.9.6 until 0.11.0, DELETE /api/v1/chats/{id} cancelled a chat's in-flight tasks before checking whether the caller could delete that chat. Any authenticated user who knew another user's chat id could abort that user's running model response, title generation, or tag generation, even though the delete was refused and no chat data was deleted, modified, or disclosed. This issue is fixed in 0.11.0.
CVSS Score
LOW
Related Weaknesses (CWE)
References
- https://github.com/open-webui/open-webui/commit/4f93c3e36c1734342a32c312bdb0516c
- https://github.com/open-webui/open-webui/pull/27006
- https://github.com/open-webui/open-webui/releases/tag/v0.11.0
- https://github.com/open-webui/open-webui/security/advisories/GHSA-3vf6-64vr-3g56
- https://github.com/open-webui/open-webui/security/advisories/GHSA-3vf6-64vr-3g56
FAQ
What is CVE-2026-70483?
CVE-2026-70483 is a vulnerability with a CVSS score of 3.1 (LOW). Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.9.6 until 0.11.0, DELETE /api/v1/chats/{id} cancelled a chat's in-flight tasks before checking whether the ...
How severe is CVE-2026-70483?
CVE-2026-70483 has been rated LOW with a CVSS base score of 3.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-70483?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.