{"schema":"threatline.record/2","record":{"id":"CVE-2026-100636","aliases":["GHSA-jf98-m24w-gm9m"],"summary":"SiYuan before v3.8.4 Path Traversal via exportBrowserHTML folder","details":"SiYuan versions before v3.8.4 contain a path traversal vulnerability in the exportBrowserHTML endpoint that allows authenticated administrators to write arbitrary HTML content to index.html outside the workspace directory. Attackers can supply a folder parameter with directory traversal sequences to escape the export directory and overwrite index.html in any pre-existing kernel-writable location, enabling stored XSS or workspace defacement.","categories":["Unclassified"],"product":"siyuan","vendor":"siyuan-note","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-100636","source_modified_at":"2026-09-28T16:50:54.968Z","fetched_at":"2026-10-23T18:52:38.922436Z","product":"siyuan","vendor":"siyuan-note","versions":[{"version":"0","status":"affected","versionType":"semver","lessThan":"3.8.4"},{"version":"3.8.4","status":"unaffected","versionType":"semver"}],"defaultStatus":"unaffected"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-100636","source_modified_at":"2026-09-28T16:50:54.968Z","fetched_at":"2026-10-23T18:52:38.922436Z","package":{"name":"siyuan","ecosystem":null},"version":"3.8.4","basis":"first unaffected version stated in the CVE record"}],"cvss":8.3,"severity":"High","kev":{"listed":false},"epss":{"probability":0.00544,"percentile":0.44897,"score_date":"2026-10-23"},"published_at":"2026-09-26T13:23:10.528Z","modified_at":"2026-09-28T16:50:54.968Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-100636","fetched_at":"2026-10-23T18:52:38.922436Z","source_modified_at":"2026-09-28T16:50:54.968Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-100636","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/siyuan-note/siyuan/security/advisories/GHSA-jf98-m24w-gm9m","tags":["exploit"]},{"source":"CVE List","url":"https://www.vulncheck.com/advisories/siyuan-before-3.8.4-path-traversal-via-exportbrowserhtml-folder","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":"partial","assessed_at":"2026-09-28T16:50:30.726443Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-09-28T16:50:54.968Z","content_hash":"77859b0ac237070ba1fad3c74bbc0544755559dd976693480219b6721c549b49"}}