open-webui Open WebUI up to 0.11.0 Role Synchronization auths.py improper synchronization

Summaryinfo

A vulnerability marked as problematic has been reported in open-webui Open WebUI up to 0.11.0. Affected is an unknown function of the file backend/open_webui/routers/auths.py of the component Role Synchronization. Performing a manipulation results in improper synchronization. This vulnerability is known as CVE-2026-87014. Remote exploitation of the attack is possible. No exploit is available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic has been found in open-webui Open WebUI up to 0.11.0. This affects an unknown code of the file backend/open_webui/routers/auths.py of the component Role Synchronization. The manipulation with an unknown input leads to a improper synchronization vulnerability. CWE is classifying the issue as CWE-662. The product utilizes multiple threads or processes to allow temporary access to a shared resource that can only be exclusive to one process at a time, but it does not properly synchronize these actions, which might cause simultaneous accesses of this resource by multiple threads or processes. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.9.0 until 0.11.1, role synchronization in backend/open_webui/routers/auths.py and backend/open_webui/utils/oauth.py updated an administrator's database role without invalidating the user record cached by backend/open_webui/socket/main.py. An administrator demoted through a trusted role header or OAuth role mapping could keep an already-open Socket.IO connection and continue reading or editing every user's collaborative notes until that connection closed. This issue is fixed in version 0.11.1.

It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2026-87014 since 09/08/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. The exploitation requires an enhanced level of successful authentication. Technical details of the vulnerability are known, but there is no available exploit.

Upgrading to version 0.11.1 eliminates this vulnerability.

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Productinfo

Vendor

• open-webui

Name

• Open WebUI

Version

• 0.1
• 0.2
• 0.3
• 0.4
• 0.5
• 0.6
• 0.7
• 0.8
• 0.9
• 0.10
• 0.11.0

CPE 2.3info

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CPE 2.2info

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