Vulnerability Description
SiYuan versions before v3.8.4 contain a path traversal vulnerability in the exportBrowserHTML endpoint that allows authenticated administrators to write arbitrary HTML content to index.html outside the workspace directory. Attackers can supply a folder parameter with directory traversal sequences to escape the export directory and overwrite index.html in any pre-existing kernel-writable location, enabling stored XSS or workspace defacement.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://github.com/siyuan-note/siyuan/security/advisories/GHSA-jf98-m24w-gm9m
- https://www.vulncheck.com/advisories/siyuan-before-3.8.4-path-traversal-via-expo
- https://github.com/siyuan-note/siyuan/security/advisories/GHSA-jf98-m24w-gm9m
FAQ
What is CVE-2026-100636?
CVE-2026-100636 is a vulnerability with a CVSS score of 7.6 (HIGH). SiYuan versions before v3.8.4 contain a path traversal vulnerability in the exportBrowserHTML endpoint that allows authenticated administrators to write arbitrary HTML content to index.html outside th...
How severe is CVE-2026-100636?
CVE-2026-100636 has been rated HIGH with a CVSS base score of 7.6/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-100636?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.