{"apiVersion":"1.0","identifier":"CVE-2026-73046","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.","publishedAt":"2026-08-15T22:16:54","lastModifiedAt":"2026-08-26T17:05:08","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-73046","cvssScore":9.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","epssProbability":0.00425,"riskScore":1.02,"affectedProduct":"SiYuan","affectedVersions":"<3.7.4","vulnerabilityType":"Web app","operatingSystems":[],"links":{"self":"https://www.redsauce.net/api/cves/CVE-2026-73046","webPages":{"es":"https://www.redsauce.net/es/cves/CVE-2026-73046","en":"https://www.redsauce.net/en/cves/CVE-2026-73046","fr":"https://www.redsauce.net/fr/cves/CVE-2026-73046","pt":"https://www.redsauce.net/pt/cves/CVE-2026-73046","de":"https://www.redsauce.net/de/cves/CVE-2026-73046","sk":"https://www.redsauce.net/sk/cves/CVE-2026-73046","el":"https://www.redsauce.net/el/cves/CVE-2026-73046"},"source":"https://nvd.nist.gov/vuln/detail/CVE-2026-73046"}}