{"id":"CVE-2026-100637","revision":"b2ad944e3dcc42ec9f6e1e9ae3ca1ff0","records":[{"revision":"b2ad944e3dcc42ec9f6e1e9ae3ca1ff0","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-100637","aliases":[],"title":"SiYuan before v3.8.4 Path Traversal via checkoutRepo sessionID","description":"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.","state":0,"publishedAt":"2026-09-26T13:23:11.226+00:00","modifiedAt":"2026-10-05T15:06:34.28+00:00","affected":[{"ecosystem":"Vendor product","name":"siyuan","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"siyuan-note\",\n                    \"product\": \"siyuan\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"packageURL\": \"pkg:golang/github.com/siyuan-note/siyuan\",\n                    \"versions\": [\n                        {\n                            \"version\": \"0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\",\n                            \"lessThan\": \"3.8.4\"\n                        },\n                        {\n                            \"version\": \"3.8.4\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:H/VA:L/SC:N/SI:H/SA:L","score":8.3,"severity":"HIGH"},{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:L","score":7.6,"severity":"HIGH"}],"references":["https://github.com/siyuan-note/siyuan/security/advisories/GHSA-jhmh-hr4g-c5g2","https://www.vulncheck.com/advisories/siyuan-before-3.8.4-path-traversal-via-checkoutrepo-sessionid"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-100637","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-100637","identifiers":["CVE-2026-100637"]},"retained":false,"historicalAffected":[]}],"coverage":[]}