CVE-2026-74867 SiYuan before 3.7.4 Cross-Site Request Forgery via CheckAuth
Attackers can perform unauthorized actions on behalf of authenticated users via CSRF due to missing Origin/Referer validation in SiYuan.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-74867?
CVE-2026-74867 is a low-severity vulnerability in siyuan-note siyuan, published on 17 Aug 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official 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.
Weakness: CWE-352
Which versions are affected by CVE-2026-74867?
How do I fix CVE-2026-74867?
No fix has been published for CVE-2026-74867 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-74867 being exploited?
There is no known exploitation of CVE-2026-74867 in the wild and no public exploit code.
Sources
Also known as GHSA-ph2h-92xh-5vmg.