{"cve":"CVE-2026-34449","nvd":{"published":"2026-03-31T22:16:19.830","modified":"2026-07-24T21:10:00.143","status":"Analyzed","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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H","score":9.6},"cwes":["CWE-942"],"references":["https://github.com/siyuan-note/siyuan/issues/17246","https://github.com/siyuan-note/siyuan/releases/tag/v3.6.2","https://github.com/siyuan-note/siyuan/security/advisories/GHSA-68p4-j234-43mv","https://github.com/siyuan-note/siyuan/security/advisories/GHSA-68p4-j234-43mv"],"products":["b3log:siyuan"],"source":"nvd","synced_at":"2026-10-19T22:28:18.033120106+00:00"},"epss":{"cve":"CVE-2026-34449","score":0.00508,"percentile":0.43423,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-68p4-j234-43mv","url":"https://osv.dev/vulnerability/GHSA-68p4-j234-43mv","summary":"SiYuan is Vulnerable to Cross-Origin RCE via Permissive CORS Policy and JavaScript Snippet Injection","modified":"2026-06-25T18:56:35.581011268Z","packages":[{"ecosystem":"Go","name":"github.com/siyuan-note/siyuan/kernel","purl":"pkg:golang/github.com/siyuan-note/siyuan/kernel","ranges":["<3.6.2"],"fixed":["3.6.2"]}]},{"id":"GO-2026-5171","url":"https://osv.dev/vulnerability/GO-2026-5171","summary":"SiYuan is Vulnerable to Cross-Origin RCE via Permissive CORS Policy and JavaScript Snippet Injection in github.com/siyuan-note/siyuan/kernel","modified":"2026-06-25T18:45:28.635317066Z","packages":[{"ecosystem":"Go","name":"github.com/siyuan-note/siyuan/kernel","purl":"pkg:golang/github.com/siyuan-note/siyuan/kernel","ranges":["all versions"],"fixed":[]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}