CVE-2026-73054

HIGH

CVE: CVE-2026-73054 - SiYuan versions before v3Sign in to save

CVSS

7.5

CVSS v3.1

EPSS

N/A

Exploit Prediction Score

Published

August 15, 2026

Exploitability

No EPSS data available

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.

Weaknesses

CWE-287

Affected Packages

No package data available.

Aliases

CVE-2026-73054

Related references

Publisher and database URLs for this record (shown for attribution; reading stays in Bugflare).

https://github.com/siyuan-note/siyuan/security/advisories/GHSA-c8w8-3pqp-wr83
https://www.vulncheck.com/advisories/siyuan-before-authentication-bypass-via-websocket