{"schemaVersion":3,"id":"CVE-2026-34449","aliases":["GHSA-68p4-j234-43mv","GO-2026-5171"],"status":"published","duplicateOf":null,"title":null,"description":"SiYuan is a personal knowledge management system. Prior to version 3.6.2, a malicious website can achieve Remote Code Execution (RCE) on any desktop running SiYuan by exploiting the permissive CORS policy (Access-Control-Allow-Origin: * + Access-Control-Allow-Private-Network: true) to inject a JavaScript snippet via the API. The injected snippet executes in Electron's Node.js context with full OS access the next time the user opens SiYuan's UI. No user interaction is required beyond visiting the malicious website while SiYuan is running. This issue has been patched in version 3.6.2.","dates":{"published":"2026-03-31T21:45:17.081Z","modified":"2026-04-01T15:52:56.545Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":9.7,"severity":"critical","version":"3.1","versionLabel":"v3.1","source":"CVE.org","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":9.7,"severity":"critical","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"OSV · 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Cross-domain Security Policy with Untrusted Domains","description":"The product uses a web-client protection\n         mechanism such as a Content Security Policy (CSP) or\n         cross-domain policy file, but the policy includes untrusted\n         domains with which the web client is allowed to\n         communicate.","type":"weakness","status":"Incomplete","abstraction":"Variant","likelihoodOfExploit":null,"url":"https://cwe.mitre.org/data/definitions/942.html"}],"affected":[{"vendor":"b3log","product":"siyuan","name":"siyuan","label":"siyuan","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"< 3.6.2","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 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3.6.2","eol":null,"hubHref":"/vendor/siyuan-note/siyuan"}],"affectedCount":3,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://github.com/siyuan-note/siyuan/security/advisories/GHSA-68p4-j234-43mv","label":"github.com/siyuan-note/siyuan/security/advisories/GHSA-68p4-j234-43mv","hostname":"github.com","tags":["X Refsource CONFIRM","WEB","Advisory","Exploit","Vendor Advisory"]},{"url":"https://github.com/siyuan-note/siyuan/issues/17246","label":"github.com/siyuan-note/siyuan/issues/17246","hostname":"github.com","tags":["X Refsource MISC","WEB","Issue Tracking"]},{"url":"https://github.com/siyuan-note/siyuan/releases/tag/v3.6.2","label":"github.com/siyuan-note/siyuan/releases/tag/v3.6.2","hostname":"github.com","tags":["X Refsource MISC","WEB","Release Notes"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-34449","label":"nvd.nist.gov/vuln/detail/CVE-2026-34449","hostname":"nvd.nist.gov","tags":["Advisory"]},{"url":"https://github.com/siyuan-note/siyuan","label":"github.com/siyuan-note/siyuan","hostname":"github.com","tags":["PACKAGE"]}],"lineage":{"upstream":[],"downstream":["OPENSUSE-SU-2026:21483-1"],"duplicates":[],"related":["OPENSUSE-SU-2026:21483-1"]},"timeline":[{"kind":"published","date":"2026-03-31T21:45:17.081Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-04-01T15:52:56.545Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":70,"level":"high","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-21T14:02:41.635Z","stale":false,"partial":false}}