CVE-2026-109286 Open WebUI 0.7.0 before 0.11.4 Session Token Theft via SyncStatsModal
Attackers can steal session tokens via cross-origin message handling, leading to account takeover and unauthorized API access.
- 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-2026-109286?
CVE-2026-109286 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 0.7.0 before 0.11.4 contains a cross-origin message handling vulnerability in SyncStatsModal that allows any website to steal a signed-in user's session token by posting unvalidated verify:chat messages. Attackers can supply a path-traversal chat id redirecting the authenticated stats export request to the auths endpoint, receiving the victim's JWT for full API access.
Weakness: CWE-346
Which versions are affected by CVE-2026-109286?
How do I fix CVE-2026-109286?
No fix has been published for CVE-2026-109286 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-109286 being exploited?
There is no known exploitation of CVE-2026-109286 in the wild and no public exploit code.
Sources
Also known as GHSA-vpq8-f445-hcq7, GHSA-x8qf-hm43-c9g2.