{"id":"CVE-2026-109288","title":"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","summary":"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: l…","severity":"medium","cvss":6.4,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:N","cwe":["CWE-79"],"published":"2026-10-12","updated":"2026-10-12","sourceUpdated":"2026-10-12T17:17:21.913","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-109288","references":[{"url":"https://github.com/open-webui/open-webui/security/advisories/GHSA-wf9m-46cp-c6h6","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/open-webui-before-0.11.4-stored-xss-via-javascript-urls-in-markdown-links","label":"disclosure@vulncheck.com"}],"tags":["nvd"],"ingestedAt":"2026-10-12T18:00:08.189Z","slug":"CVE-2026-109288","body":"## Overview\n\nOpen 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":35,"depthScoreParts":{"impact":35.2,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}