Open WebUI up to 0.10.x Folder folders.py improper authorization

Summaryinfo

A vulnerability has been found in Open WebUI up to 0.10.x and classified as problematic. Affected by this issue is some unknown functionality of the file backend/open_webui/routers/folders.py of the component Folder. This manipulation causes improper authorization. The identification of this vulnerability is CVE-2026-70494. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability has been found in Open WebUI up to 0.10.x and classified as problematic. Affected by this vulnerability is an unknown part of the file backend/open_webui/routers/folders.py of the component Folder. The manipulation with an unknown input leads to a improper authorization vulnerability. The CWE definition for the vulnerability is CWE-285. The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action. As an impact it is known to affect integrity, and availability. The summary by CVE is:

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.

The advisory is shared at github.com. This vulnerability is known as CVE-2026-70494 since 08/04/2026. The exploitation appears to be easy. The attack can be launched remotely. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1548.002 for this issue.

Upgrading to version 0.11.0 eliminates this vulnerability.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Name

• Open WebUI

Version

• 0.1
• 0.2
• 0.3
• 0.4
• 0.5
• 0.6
• 0.7
• 0.8
• 0.9
• 0.10

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CPE 2.2info

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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