{"id":"CVE-2026-85583","state":"PUBLISHED","title":"SiYuan before v3.8.2 Path Traversal via symlink in file API","description":"SiYuan versions before v3.8.2 contain a path traversal vulnerability in the reader-accessible file-read endpoint that follows symlinks when opening authorized asset paths. Attackers with reader role can request a logical asset under data/assets/ that is a symlink to a file outside the workspace and receive the target file bytes, bypassing workspace boundary restrictions.","publishedAt":"2026-09-04T11:29:51.462Z","updatedAt":"2026-09-14T19:33:10.308Z","severity":{"score":7.1,"label":"High","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","source":"VulnCheck"},"assigner":"VulnCheck","products":["siyuan-note siyuan"],"affected":[{"vendor":"siyuan-note","product":"siyuan","packageURL":"pkg:golang/github.com/siyuan-note/siyuan","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"3.8.2","versionType":"semver"},{"version":"3.8.2","status":"unaffected","versionType":"semver"}]}],"references":["https://github.com/siyuan-note/siyuan/security/advisories/GHSA-g7gf-v79m-jwrm","https://www.vulncheck.com/advisories/siyuan-before-3.8.2-path-traversal-via-symlink-in-file-api"],"weaknesses":["CWE-59"],"ingestedAt":"2026-10-29T20:13:15.269Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/85xxx/CVE-2026-85583.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-85583","state":"PUBLISHED","datePublished":"2026-09-04T11:29:51.462Z","dateUpdated":"2026-09-14T19:33:10.308Z","assignerShortName":"VulnCheck","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateReserved":"2026-09-04T10:56:22.465Z"},"containers":{"cna":{"title":"SiYuan before v3.8.2 Path Traversal via symlink in file API","descriptions":[{"lang":"en","value":"SiYuan versions before v3.8.2 contain a path traversal vulnerability in the reader-accessible file-read endpoint that follows symlinks when opening authorized asset paths. Attackers with reader role can request a logical asset under data/assets/ that is a symlink to a file outside the workspace and receive the target file bytes, bypassing workspace boundary restrictions."}],"affected":[{"vendor":"siyuan-note","product":"siyuan","packageURL":"pkg:golang/github.com/siyuan-note/siyuan","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"3.8.2","versionType":"semver"},{"version":"3.8.2","status":"unaffected","versionType":"semver"}]}],"references":[{"url":"https://github.com/siyuan-note/siyuan/security/advisories/GHSA-g7gf-v79m-jwrm","tags":["vendor-advisory"],"name":"GitHub Security Advisory (GHSA-g7gf-v79m-jwrm)"},{"url":"https://www.vulncheck.com/advisories/siyuan-before-3.8.2-path-traversal-via-symlink-in-file-api","name":"VulnCheck Advisory: SiYuan before v3.8.2 Path Traversal via symlink in file API","tags":["third-party-advisory"]}],"metrics":[{"format":"CVSS","cvssV4_0":{"version":"4.0","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"LOW","userInteraction":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":7.1,"baseSeverity":"HIGH"}},{"format":"CVSS","cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"NONE","availabilityImpact":"NONE","baseScore":6.5,"baseSeverity":"MEDIUM"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-59","lang":"en","description":"Improper Link Resolution Before File Access ('Link Following')","type":"CWE"}]}],"providerMetadata":{"shortName":"VulnCheck","orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateUpdated":"2026-09-04T11:29:51.462Z"},"datePublic":"2026-08-21T00:00:00.000Z","cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:b3log:siyuan:*:*:*:*:*:*:*:*","versionEndExcluding":"3.8.2"}]}]}],"x_generator":{"engine":"vulncheck-endgame"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2026-85583","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2026-09-14T19:19:17.004578Z"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-14T19:33:10.308Z"}}]}}}