Categories
CVE-2026-33203

SiYuan has an Unauthenticated WebSocket DoS via Auth Keepalive Bypass

Summary

SiYuan has an Unauthenticated WebSocket DoS via Auth Keepalive Bypass

Original description

The description as published by the source.

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.

Source: OSV.dev (Open Source Vulnerabilities) NVD GitHub Advisory OSV

References

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