CVE-2026-33203

HIGH

7.5

Description

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 parsed using unchecked type assertions on attacker-controlled JSON. A remote attacker can send malformed messages that trigger a runtime panic, potentially crashing the kernel process and causing denial of service. Version 3.6.2 fixes the issue.

Details CVE

Score CVSS v3.17.5

SeveriteHIGH

Vecteur CVSSCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Vecteur d'attaqueNETWORK

ComplexiteLOW

Privileges requisNONE

Interaction utilisateurNONE

Publie3/20/2026

Derniere modification3/23/2026

Sourcenvd

Observations honeypot0

Produits affectes

b3log:siyuan

Faiblesses (CWE)

CWE-248CWE-306

References

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

Correlations IOC

Aucune correlation enregistree

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