{"schema":"threatline.record/2","record":{"id":"CVE-2026-100637","aliases":["GHSA-jhmh-hr4g-c5g2"],"summary":"SiYuan before v3.8.4 Path Traversal via checkoutRepo sessionID","details":"SiYuan versions before v3.8.4 contain a path traversal vulnerability in the checkoutRepo endpoint that allows authenticated administrators to write JSON files outside the workspace. Attackers can supply a sessionID parameter containing directory traversal sequences to overwrite arbitrary JSON files in pre-existing kernel-writable directories outside workspace boundaries.","categories":["Unclassified"],"product":"siyuan","vendor":"siyuan-note","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-100637","source_modified_at":"2026-10-05T15:06:34.280Z","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-2026-100637","source_modified_at":"2026-10-05T15:06:34.280Z","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":0.00474,"percentile":0.40025,"score_date":"2026-10-23"},"published_at":"2026-09-26T13:23:11.226Z","modified_at":"2026-10-05T15:06:34.280Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-100637","fetched_at":"2026-10-23T18:52:38.922436Z","source_modified_at":"2026-10-05T15:06:34.280Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-100637","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-jhmh-hr4g-c5g2","tags":["exploit"]},{"source":"CVE List","url":"https://www.vulncheck.com/advisories/siyuan-before-3.8.4-path-traversal-via-checkoutrepo-sessionid","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":"2026-10-05T15:06:28.154306Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-10-05T15:06:34.280Z","content_hash":"61fa0dd4b5220d3c2ae0243e6f0074300993f986bb66bd75a4694fe52e21cd90"}}