CVE-2026-33203 - Vulnerability Analysis

Overview

SiYuan < 3.6.2 contains a denial of service vulnerability caused by unauthenticated WebSocket connections with unchecked type assertions on attacker-controlled JSON, letting remote attackers crash the kernel process, exploit requires specific "auth keepalive" query parameter.

Severity & Score

Impact

Remote attackers can crash the kernel process, causing denial of service.

Mitigation

Update to version 3.6.2 or later.

References

• https://github.com/siyuan-note/siyuan/security/advisories/GHSA-3g9h-9hp4-654v

Social Media Activity(1 post)

TheHackerWire

@thehackerwire

Mar 22, 2026

🟠 CVE-2026-33203 - High (7.5) SiYuan is a personal knowledge management system. Prior to version 3.6.2, the SiYuan kernel WebSocket server accepts unauthenticated connections when a specific "auth keepalive" query parameter is present. After connection, incoming messages are p... 🔗 https://www.thehackerwire.com/vulnerability/CVE-2026-33203/ #CVE #vulnerability #infosec #cybersecurity #security #Tenda #patchstack

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