CVE-2026-74802
SiYuan versions before 3.7.4 contain a cross-site WebSocket hijacking vulnerability in the admin-only /ws/network/proxy endpoint that explicitly disables origin validation by setting CheckOrigin to unconditionally return true. Attackers can craft malicious webpages that establish WebSocket connections to this endpoint and direct the SiYuan kernel process to proxy arbitrary network traffic to attacker-chosen targets, enabling authenticated network pivoting through the victim's machine.
Scoring
- Severity
- HIGH
- CVSS base score
- 8.2
- CVSS vector
- CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:L/VA:N/SC:L/SI:L/SA:N
- EPSS probability
- 0.12%
- CWE
- CWE-346
- Published
- 2026-08-17
- Last modified
- 2026-08-28
Affected products
- siyuan-note siyuan
- siyuan-note siyuan
Weakness type
Related vulnerabilities
- CVE-2026-87563 — Origin validation error in Paint in Google Chrome prior to 153.0.8010.36 allowed a remote attacker...
- CVE-2026-58649 — .NET Information Disclosure Vulnerability
- CVE-2026-69559 — Microsoft Teams for Android Information Disclosure Vulnerability
- CVE-2026-69680 — Windows DNS Spoofing Vulnerability
- CVE-2026-75156 — Apache Airflow FAB provider: FAB Azure AD OAuth: id_token issuer/audience not validated — cross-tenant authentication bypass
- CVE-2026-85152 — undici vulnerable to cross-origin cache poisoning via missing origin isolation in interceptors
- CVE-2026-84482 — WWBN AVideo Cross-Site Request Forgery via get_domain() validation
- CVE-2026-82811 — Toggl OÜ Toggl Track Extension postMessage origin validation