Vulnerability Description
SiYuan versions before v3.8.4 contain a path traversal vulnerability in the setNotebookIcon endpoint that allows authenticated administrators to create arbitrary directory trees and write files outside the workspace boundary. Attackers can supply directory traversal sequences in the notebook parameter to escape the workspace data directory and write conf.json files to arbitrary locations accessible by the kernel process.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://github.com/siyuan-note/siyuan/security/advisories/GHSA-6h8x-6mph-7438
- https://www.vulncheck.com/advisories/siyuan-before-3.8.4-path-traversal-via-setn
- https://github.com/siyuan-note/siyuan/security/advisories/GHSA-6h8x-6mph-7438
FAQ
What is CVE-2026-100638?
CVE-2026-100638 is a vulnerability with a CVSS score of 7.6 (HIGH). SiYuan versions before v3.8.4 contain a path traversal vulnerability in the setNotebookIcon endpoint that allows authenticated administrators to create arbitrary directory trees and write files outsid...
How severe is CVE-2026-100638?
CVE-2026-100638 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-2026-100638?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.