{"schemaVersion":3,"id":"CVE-2026-109309","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"SiYuan v3.7.0 before v3.8.6 contains an absolute path traversal vulnerability in the kernel's private plugin HTTP server, which passes a kernel plugin handler's ResponseFile.Path to gin's Context.File without validation. Attackers supplying a malicious kernel plugin can return an absolute path to read any file readable by the SiYuan process, including the API token and conf.json.","dates":{"published":"2026-10-12T16:05:05.359Z","modified":"2026-10-13T16:54:55.029Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":6.9,"severity":"medium","version":"4.0","versionLabel":"v4.0","source":"NVD","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","computed":false,"selection":"backend-summary"},"metrics":[{"version":"4.0","versionLabel":"v4.0","source":"NVD","score":6.9,"severity":"medium","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":6.5,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N","exploitability":null,"impact":null,"computed":false},{"version":"4.0","versionLabel":"v4.0","source":"CVE.org","score":6.9,"severity":"medium","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":6.5,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.00381,"percentile":0.30655,"severity":"low","asOf":"2026-10-19T00:00:00.000Z","change":{"pp":null,"baselineDate":null,"baselineScore":null},"history":[{"date":"2026-10-13T00:00:00.000Z","score":0.00381,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00381,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00381,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00381,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00381,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00381,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00381,"percentile":0.30655}],"last30":[{"date":"2026-10-13T00:00:00.000Z","score":0.00381,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00381,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00381,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00381,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00381,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00381,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00381,"percentile":0.30655}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[{"id":"CWE-22","name":"Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')","description":"The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.","type":"weakness","status":"Stable","abstraction":"Base","likelihoodOfExploit":"High","url":"https://cwe.mitre.org/data/definitions/22.html"}],"affected":[{"vendor":"siyuan-note","product":"siyuan","name":"siyuan","label":"siyuan","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ 3.7.0, < 3.8.6","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 3.7.0, < 3.8.6","eol":null,"hubHref":"/vendor/siyuan-note/siyuan"}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://github.com/siyuan-note/siyuan/commit/c6494375ea40ee973f430f0e85d50f1862a30d81","label":"github.com/siyuan-note/siyuan/commit/c6494375ea40ee973f430f0e85d50f1862a30d81","hostname":"github.com","tags":["Patch"]},{"url":"https://github.com/siyuan-note/siyuan/security/advisories/GHSA-phmw-4rgv-r4xv","label":"github.com/siyuan-note/siyuan/security/advisories/GHSA-phmw-4rgv-r4xv","hostname":"github.com","tags":["Vendor Advisory"]},{"url":"https://www.vulncheck.com/advisories/siyuan-3.7.0-before-3.8.6-arbitrary-file-read-via-plugin-responsefile-path","label":"www.vulncheck.com/advisories/…","hostname":"www.vulncheck.com","tags":["Third Party Advisory"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2026-10-12T16:05:05.359Z","label":"Published","detail":"Vulnerability first 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