Is CVE-2026-74867 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-74867?

CVE-2026-74867 has a CVSS v3 severity of MEDIUM (4.2).

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CVE-2026-74867

Description

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.