MajorCritical vulnerability

CVE-2026-109291 (CVSS 8.5)

NVD · officialPublished Oct 12, 2026Risk 37/100

Open WebUI from 0.6.33 before 0.11.4 contains a cross-site scripting vulnerability that allows authenticated users to execute script in victims' sessions by storing javascript: URLs in citation embed_url fields. Attackers can share a crafted chat whose citation, when clicked, is passed to window.open, letting them steal localStorage.token and act as the victim.

Technical details

CVSS

8.5

AV:NetworkAC:LowPR:LowUI:Passive

Evidence and sources

This record is attributed to NVD. Exploitation status and remediation guidance are kept separate from the vulnerability's technical severity.

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