CVE-2026-70492

Description

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.10.0 until 0.11.0, src/lib/components/chat/Messages/Markdown/KatexRenderer.svelte could store and render a chat message whose math block makes KaTeX fail with a stack overflow instead of a parse error. The catch branch fell back to inserting the original math source into the page as HTML through {@html} rather than as text, so script in the message runs in the browser of whoever views it, including shared chats and channels. The viewer's session token in localStorage can be stolen, and an administrator viewer can have their account taken over. This issue is fixed in 0.11.0.

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Produits concernés

• open-webui
• Openwebui open webui

Scores CVSS

Faiblesses (CWE)

• CWE-79

Références

• https://github.com/open-webui/open-webui/commit/bc600d3f085802c45aa8f38c30e6e8c986bde6cc Patch
• https://github.com/open-webui/open-webui/pull/26718 PatchVendor Advisory
• https://github.com/open-webui/open-webui/releases/tag/v0.11.0 Release Notes
• https://github.com/open-webui/open-webui/security/advisories/GHSA-pwxh-7358-jq2x ExploitPatchVendor Advisory
• https://github.com/open-webui/open-webui/security/advisories/GHSA-pwxh-7358-jq2x ExploitPatchVendor Advisory

Ailleurs

• NVD
• CVE.org
• CIRCL Vulnerability-Lookup
• CERT-FR
• GitHub Advisories