{"id":"CVE-2026-23850","state":"PUBLISHED","title":"SiYuan vulnerable to arbitrary file read","description":"SiYuan is a personal knowledge management system. In versions prior to 3.5.4, the markdown feature allows unrestricted server side html-rendering which allows arbitrary file read (LFD). Version 3.5.4 fixes the issue.","publishedAt":"2026-01-19T19:52:58.615Z","updatedAt":"2026-01-20T20:05:16.346Z","severity":{"score":7.8,"label":"High","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N/E:P","source":"GitHub_M"},"assigner":"GitHub_M","products":["siyuan-note siyuan"],"affected":[{"vendor":"siyuan-note","product":"siyuan","versions":[{"version":"< 3.5.4","status":"affected"}]}],"references":["https://github.com/siyuan-note/siyuan/security/advisories/GHSA-cv54-7wv7-qxcw","https://github.com/siyuan-note/siyuan/issues/16860","https://github.com/siyuan-note/siyuan/commit/b2274baba2e11c8cf8901b0c5c871e5b27f1f6dd","https://github.com/siyuan-note/siyuan/commit/f8f4b517077b92c90c0d7b51ac11be1b34b273ad","https://github.com/siyuan-note/siyuan/blob/master/kernel/model/file.go#L1035","https://github.com/siyuan-note/siyuan/blob/v3.4.2/kernel/api/filetree.go#L799-L886"],"weaknesses":["CWE-22"],"ingestedAt":"2026-10-29T20:11:21.040Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/23xxx/CVE-2026-23850.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-23850","state":"PUBLISHED","datePublished":"2026-01-19T19:52:58.615Z","dateUpdated":"2026-01-20T20:05:16.346Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-01-16T15:46:40.843Z"},"containers":{"cna":{"title":"SiYuan vulnerable to arbitrary file read","descriptions":[{"lang":"en","value":"SiYuan is a personal knowledge management system. In versions prior to 3.5.4, the markdown feature allows unrestricted server side html-rendering which allows arbitrary file read (LFD). Version 3.5.4 fixes the issue."}],"affected":[{"vendor":"siyuan-note","product":"siyuan","versions":[{"version":"< 3.5.4","status":"affected"}]}],"references":[{"url":"https://github.com/siyuan-note/siyuan/security/advisories/GHSA-cv54-7wv7-qxcw","name":"https://github.com/siyuan-note/siyuan/security/advisories/GHSA-cv54-7wv7-qxcw","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/siyuan-note/siyuan/issues/16860","name":"https://github.com/siyuan-note/siyuan/issues/16860","tags":["x_refsource_MISC"]},{"url":"https://github.com/siyuan-note/siyuan/commit/b2274baba2e11c8cf8901b0c5c871e5b27f1f6dd","name":"https://github.com/siyuan-note/siyuan/commit/b2274baba2e11c8cf8901b0c5c871e5b27f1f6dd","tags":["x_refsource_MISC"]},{"url":"https://github.com/siyuan-note/siyuan/commit/f8f4b517077b92c90c0d7b51ac11be1b34b273ad","name":"https://github.com/siyuan-note/siyuan/commit/f8f4b517077b92c90c0d7b51ac11be1b34b273ad","tags":["x_refsource_MISC"]},{"url":"https://github.com/siyuan-note/siyuan/blob/master/kernel/model/file.go#L1035","name":"https://github.com/siyuan-note/siyuan/blob/master/kernel/model/file.go#L1035","tags":["x_refsource_MISC"]},{"url":"https://github.com/siyuan-note/siyuan/blob/v3.4.2/kernel/api/filetree.go#L799-L886","name":"https://github.com/siyuan-note/siyuan/blob/v3.4.2/kernel/api/filetree.go#L799-L886","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"LOW","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":7.8,"baseSeverity":"HIGH","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N/E:P","version":"4.0"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-22","lang":"en","description":"CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-01-19T19:56:47.029Z"},"source":{"advisory":"GHSA-cv54-7wv7-qxcw","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-01-20T20:04:00.809446Z","id":"CVE-2026-23850","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-01-20T20:05:16.346Z"}}]}}}