CVE-2026-70494

8.1 HIGHpublic exploit available

Published 2026-08-04 · Updated 2026-08-05

AI risk analysis

Summary: The flaw allows a user with write access to a shared chat folder to delete chats and messages belonging to the folder owner, potentially leading to data loss.
Exploitability: Exploitation requires write access to a shared chat folder; preconditions include having such access or being part of the shared group.
Blast radius: If exploited, this could result in significant data loss for the folder owner, impacting communication and collaboration within the platform.
Prioritized remediation: Upgrade to version 0.11.0 or later to apply the necessary fix.

data-losswebauth-bypassself-hosted

Analysis generated locally by qwen2.5:7b-instruct (no data left the box). AI-assisted — verify against primary sources before acting.

NVD 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 vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

Weaknesses

CWE-862, CWE-863

Public exploit & PoC references

All references

Source data: NVD (nvd.nist.gov), public domain. Exploit-DB.ai adds local AI analysis for defensive use only.