CVE-2026-74867CWE-352csrf

CVE-2026-74867

Medium · published August 17, 2026

CVSS v3.1
4.2
EPSS
0%
Percentile
2.5
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
4.2 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N
CVSS v4.0
2.3 · CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
EPSS
0.00131 · 2.5th percentile
Weakness
CWE-352 · Cross-Site Request Forgery (CSRF)
Published
2026-08-17T15:16Z
References (2)
https://github.com/siyuan-note/siyuan/security/advisories/GHSA-hhm2-g993-p656 · [email protected]https://www.vulncheck.com/advisories/siyuan-before-cross-site-request-forgery-via-checkauth · [email protected]
EPSS history
Timeline
  • 17 AUG 11:04Z
    SiYuan before 3.7.4 Cross-Site Request Forgery via CheckAuth
    cvelistv5