SEPTEMBER 19, 2026
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Case File

CVE-2026-74867

MEDIUM · CVSS 4.2 EPSS 0.10% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-08-17 · Last synced 2026-09-16

CyberRota Analysis

AI-Generated

Versions of SiYuan prior to 3.7.4 are vulnerable to a cross-site request forgery (CSRF) issue due to inadequate validation of Origin/Referer headers and the absence of a SameSite attribute on session cookies. This flaw allows attackers to exploit authenticated sessions by tricking users into submitting unauthorized requests through malicious web pages. Organizations using affected versions should prioritize patching to mitigate the risk of unauthorized actions being executed on behalf of their users.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

GitHub PoC Links

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2026-74867
Severity
MEDIUM
CVSS
4.2
EPSS
0.10%

Original NVD 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.