Vulnerability Description
SiYuan before v3.7.4 improperly restricts excessive authentication attempts in the CheckAuth() middleware. The HTTP Basic Authentication branch, which guards nearly the entire /api/* surface, accepts the workspace access code (Conf.AccessAuthCode) as the Basic Auth password but never consults the CAPTCHA/lockout gate or increments the failure counter used by the cookie/session login path. This allows unauthenticated remote attackers to brute-force the admin access code with unlimited automated requests and obtain full RoleAdministrator access to the kernel. A secondary weakness exists because the access code is compared using a non-constant-time string comparison.
CVSS Score
CRITICAL
Related Weaknesses (CWE)
References
- https://github.com/siyuan-note/siyuan/security/advisories/GHSA-w3xh-mmmh-r54v
- https://www.vulncheck.com/advisories/siyuan-before-authentication-bypass-via-htt
- https://github.com/siyuan-note/siyuan/security/advisories/GHSA-w3xh-mmmh-r54v
FAQ
What is CVE-2026-73046?
CVE-2026-73046 is a vulnerability with a CVSS score of 9.8 (CRITICAL). SiYuan before v3.7.4 improperly restricts excessive authentication attempts in the CheckAuth() middleware. The HTTP Basic Authentication branch, which guards nearly the entire /api/* surface, accepts ...
How severe is CVE-2026-73046?
CVE-2026-73046 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-73046?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.