← Back

CVE-2026-33203

nvd nist
Published: Mar 20, 2026Modified: Jun 17, 2026

JSON object

Loading...
7.5
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Exploitability: 3.9 / Impact: 3.6
Source: security-advisories@github.com (Secondary)

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.

Affected (1)

Products: B3log: Siyuan
B3log
1 product
Siyuan
Configuration A
1 vulnerable
Vulnerable SoftwareAffected Versions
Siyuan
Before 3.6.2

Related CWEs

CWE-248
Uncaught Exception
An exception is thrown from a function, but it is not caught.
CWE-306
Missing Authentication for Critical Function
The product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources.

References (1)

Source: security-advisories@github.com
ExploitVendor Advisory

Timeline

No history available yet.