CVE-2026-109288 [MEDIUM] – Open WebUI before 0.11.4 contains a stored cross-site scripting vulnerability in MarkdownI

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.