CVE-2026-74867
MediumCVSS 4.2Exploitation Probability (EPSS)
Low risk1th percentile - higher than 1% of all known CVEs
Summary
SiYuan versions before 3.7.4 contain a cross-site request forgery vulnerability in the session-cookie authentication branch of CheckAuth() that lacks Origin/Referer validation and sets no explicit SameSite attribute on session cookies. Attackers can craft malicious web pages that perform unauthorized actions on behalf of authenticated users by submitting requests with valid session cookies, relying on browser default SameSite policies rather than server-enforced protections.
Risk Assessment
Users may be tricked into performing unauthorized actions in SiYuan, potentially leading to data breaches or unauthorized changes.
Recommendation
Update SiYuan to version 3.7.4 or later, which includes a fix for this vulnerability.
Original NVD description (English source)
SiYuan versions before 3.7.4 contain a cross-site request forgery vulnerability in the session-cookie authentication branch of CheckAuth() that lacks Origin/Referer validation and sets no explicit SameSite attribute on session cookies. Attackers can craft malicious web pages that perform unauthorized actions on behalf of authenticated users by submitting requests with valid session cookies, relying on browser default SameSite policies rather than server-enforced protections.