CVE-2026-109292 Open WebUI 0.6.27 before 0.11.4 Session Token Disclosure via OAuth-Mode Connections
Attackers controlling OAuth-mode connections can steal user session cookies to hijack accounts, including administrators, in Open WebUI.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-109292?
CVE-2026-109292 is a high-severity vulnerability in open-webui, published on 12 Oct 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
Open WebUI from 0.6.27 before 0.11.4 contains an information disclosure vulnerability that allows destination servers to obtain user session cookies by receiving the full browser cookie jar on OAuth-mode connections. Operators of OpenAI-compatible connections, OpenAPI tool servers or terminal servers can capture forwarded session cookies from routine requests and replay them to hijack accounts, including administrators.
Weakness: CWE-200
Which versions are affected by CVE-2026-109292?
How do I fix CVE-2026-109292?
No fix has been published for CVE-2026-109292 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-109292 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-109292 exists.
Sources
Also known as GHSA-crcq-c44m-c92x, GHSA-gqfh-jxvw-74rp.