Vulnerability Description
SiYuan versions before v3.8.4 contain a path traversal vulnerability in the checkoutRepo endpoint that allows authenticated administrators to write JSON files outside the workspace. Attackers can supply a sessionID parameter containing directory traversal sequences to overwrite arbitrary JSON files in pre-existing kernel-writable directories outside workspace boundaries.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://github.com/siyuan-note/siyuan/security/advisories/GHSA-jhmh-hr4g-c5g2
- https://www.vulncheck.com/advisories/siyuan-before-3.8.4-path-traversal-via-chec
- https://github.com/siyuan-note/siyuan/security/advisories/GHSA-jhmh-hr4g-c5g2
FAQ
What is CVE-2026-100637?
CVE-2026-100637 is a vulnerability with a CVSS score of 7.6 (HIGH). SiYuan versions before v3.8.4 contain a path traversal vulnerability in the checkoutRepo endpoint that allows authenticated administrators to write JSON files outside the workspace. Attackers can supp...
How severe is CVE-2026-100637?
CVE-2026-100637 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-2026-100637?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.