CVE-2026-88006 Open WebUI: Users denied by the OAuth role policy can still sign in via token exchange

Medium 6.5 Published 10 Sep 2026 Updated 10 Sep 2026

Attackers denied by OAuth role policies can bypass restrictions and obtain valid sessions via the token exchange endpoint in Open WebUI.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: Available

What is CVE-2026-88006?

CVE-2026-88006 is a medium-severity authentication bypass vulnerability in Openwebui Open Webui, published on 10 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.8.0 until 0.11.1, Open WebUI's OAuth token exchange endpoint issues a session for a provider access token without running the OAuth role management that the normal OAuth login callback runs. A user whose provider roles the login callback would refuse, or would demote, could still obtain a working session at their existing role through this endpoint. This issue is fixed in version 0.11.1.

Weakness: CWE-863

Which versions are affected by CVE-2026-88006?

3 open source packages ship an affected version, including open-webui. It affects 1 product.

Package	Affected	Fixed in
`open-webui` PyPI	From `0.8.0`	`0.11.1`
`open-webui` PyPI	From `0.8.0`	`0.11.1`
`open-webui` PyPI	From `0.8.0`	`0.11.1`

Products include Openwebui Open Webui.

How do I fix CVE-2026-88006?

Upgrade open-webui to 0.11.1 or later.

Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.

Is CVE-2026-88006 being exploited?

There is no known exploitation of CVE-2026-88006 in the wild and no public exploit code.

All Openwebui Open Webui vulnerabilities

Sources

Also known as GHSA-wvm9-9g5j-623f, PYSEC-2026-4129.