Vulnerability Description
SiYuan before v3.7.4 contains an information disclosure vulnerability in the /api/filetree/authFilePublishAccess endpoint, which is registered with CheckAuth only and is reachable anonymously. The endpoint never sets a failure code, so its outcome is signalled entirely by the response message and by the presence of a Set-Cookie header, and these signals differ across access tiers. By submitting requests with an empty password for a candidate document identifier, an anonymous attacker can distinguish whether a document is public/nonexistent, password-protected, or exists at the hidden or forbidden tier, thereby confirming the existence of documents they are not permitted to access. Because hidden and forbidden entries store an empty password, such requests also cause the server to issue a publish-auth cookie for forbidden documents.
CVSS Score
MEDIUM
Related Weaknesses (CWE)
References
- https://github.com/siyuan-note/siyuan/security/advisories/GHSA-4pjg-x8qj-33j5
- https://www.vulncheck.com/advisories/siyuan-before-information-disclosure-via-au
FAQ
What is CVE-2026-73630?
CVE-2026-73630 is a vulnerability with a CVSS score of 5.8 (MEDIUM). SiYuan before v3.7.4 contains an information disclosure vulnerability in the /api/filetree/authFilePublishAccess endpoint, which is registered with CheckAuth only and is reachable anonymously. The end...
How severe is CVE-2026-73630?
CVE-2026-73630 has been rated MEDIUM with a CVSS base score of 5.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-73630?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.