HIGH
CVE-2026-70494
CVSS
8.1
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.
Weakness (CWE)
CWE-862
Missing Authorization
CWE-863
Incorrect Authorization
EPSS Score
0.3%
Probability of exploitation in next 30 days
22.6th percentile
References
https://github.com/open-webui/open-webui/commit/915ef7d0798d3175819cedbb2f62d7bf0db78c98
Patch
https://github.com/open-webui/open-webui/pull/27003
Patch, Vendor Advisory
https://github.com/open-webui/open-webui/releases/tag/v0.11.0
Release Notes
https://github.com/open-webui/open-webui/security/advisories/GHSA-3cg5-48j3-v4gv
Patch, Vendor Advisory
Base CVE data derived from NVD (public domain). Enrichment by
dbcve.org
(CC-BY-4.0). Fetched via API.