CVE-2026-109291

CVSS 8.5 (high) · published 2026-10-12

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.

Weakness: CWE-79

Source: NVD CVE-2026-109291

References

• https://github.com/open-webui/open-webui/security/advisories/GHSA-qpqv-xwg8-cqpj
• https://www.vulncheck.com/advisories/open-webui-0.6.33-before-0.11.4-stored-xss-via-citation-embed-url

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