CVE-2026-23851: SiYuan Vulnerable to Arbitrary File Read via File Copy Functionality
The SiYuan Note application (v3.5.3) contains a logic vulnerability in the /api/file/globalCopyFiles endpoint. The function allows authenticated users to copy files from any location on the server’s filesystem into the application’s workspace without proper path validation
References
- github.com/advisories/GHSA-94c7-g2fj-7682
- github.com/siyuan-note/siyuan
- github.com/siyuan-note/siyuan/commit/b2274baba2e11c8cf8901b0c5c871e5b27f1f6dd
- github.com/siyuan-note/siyuan/commit/f8f4b517077b92c90c0d7b51ac11be1b34b273ad
- github.com/siyuan-note/siyuan/issues/16860
- github.com/siyuan-note/siyuan/security/advisories/GHSA-94c7-g2fj-7682
- nvd.nist.gov/vuln/detail/CVE-2026-23851
Code Behaviors & Features
Detect and mitigate CVE-2026-23851 with GitLab Dependency Scanning
Secure your software supply chain by verifying that all open source dependencies used in your projects contain no disclosed vulnerabilities. Dependency Scanning using SBOM also detects vulnerabilities from proprietary advisories that this site does not include. Learn more about Dependency Scanning using SBOM →