CVE-2026-109288

CVSS 7.2 (high) · published 2026-10-12

Open WebUI before 0.11.4 contains a stored cross-site scripting vulnerability in MarkdownInlineTokens.svelte, which renders markdown link URLs into anchor hrefs without validating their scheme. Authenticated users can embed javascript: links in shared chats that, when clicked by a victim, steal the victim's JWT from local storage, including admins' tokens.

Weakness: CWE-79

Source: NVD CVE-2026-109288

References

• https://github.com/open-webui/open-webui/security/advisories/GHSA-wf9m-46cp-c6h6
• https://www.vulncheck.com/advisories/open-webui-before-0.11.4-stored-xss-via-javascript-urls-in-markdown-links
• https://github.com/open-webui/open-webui/security/advisories/GHSA-wf9m-46cp-c6h6

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