CVE-2026-73054

HighCVSS 7.5/10Last modified Aug 26, 2026

Description

SiYuan versions before v3.7.4 contain an authentication bypass vulnerability in the WebSocket endpoint caused by differential parsing of query parameters between authentication exemption and session quarantine checks. Unauthenticated attackers can craft a malicious WebSocket URI with duplicated query parameters to bypass access auth code validation and receive the live kernel event stream including document identifiers, titles, and operation logs.

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Weakness enumeration

CWE-287

Affected software

No affected versions have been published.

Timeline

Published: Aug 15, 2026
Last modified: Aug 26, 2026
NVD status: Deferred

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