{"schema":"threatline.record/2","record":{"id":"CVE-2026-109288","aliases":["GHSA-wf9m-46cp-c6h6"],"summary":"Open WebUI before 0.11.4 Stored XSS via javascript: URLs in Markdown Links","details":"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.","categories":["Unclassified"],"product":"open-webui","vendor":"open-webui","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-109288","source_modified_at":"2026-10-23T21:57:52.520Z","fetched_at":"2026-10-23T22:01:05.715934Z","product":"open-webui","vendor":"open-webui","versions":[{"version":"0","status":"affected","versionType":"semver","lessThan":"0.11.4"},{"version":"0.11.4","status":"unaffected","versionType":"semver"}],"defaultStatus":"unaffected"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-109288","source_modified_at":"2026-10-23T21:57:52.520Z","fetched_at":"2026-10-23T22:01:05.715934Z","package":{"name":"open-webui","ecosystem":null},"version":"0.11.4","basis":"first unaffected version stated in the CVE record"}],"cvss":7.2,"severity":"High","kev":{"listed":false},"epss":{"probability":0.00231,"percentile":0.13229,"score_date":"2026-10-23"},"published_at":"2026-10-12T16:04:50.352Z","modified_at":"2026-10-23T21:57:52.520Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-109288","fetched_at":"2026-10-23T22:01:05.715934Z","source_modified_at":"2026-10-23T21:57:52.520Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-109288","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://github.com/open-webui/open-webui/security/advisories/GHSA-wf9m-46cp-c6h6","tags":["exploit"]},{"source":"CVE List","url":"https://www.vulncheck.com/advisories/open-webui-before-0.11.4-stored-xss-via-javascript-urls-in-markdown-links","tags":["third-party-advisory"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"poc","automatable":"no","technical_impact":"total","assessed_at":"2026-10-13T15:39:15.981425Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-10-23T21:57:52.520Z","content_hash":"86abc3a0af2fb44cd5e5d77a252f13a486c0293ad6ee31053394f608f589420d"}}