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.

CVSS v3 8.2 HIGH

8.2^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 4.7

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact LOW

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://github.com/siyuan-note/siyuan/security/advisories/GHSA-3cc2-h3v6-rqpq
https://www.vulncheck.com/advisories/siyuan-cross-site-websocket-hijacking-via-network-proxy
https://github.com/siyuan-note/siyuan/security/advisories/GHSA-3cc2-h3v6-rqpq

Configurations

No configuration.

History

No history.

Information

Published : 2026-08-17 11:16

Updated : 2026-08-28 16:18

NVD link : CVE-2026-74802

Mitre link : CVE-2026-74802

CVE.ORG link : CVE-2026-74802

JSON object : View

Products Affected

No product.

CWE

CWE-346

Origin Validation Error

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