CVE-2026-73054

High

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.

SeverityHigh

CVSS7.5

Exploit probability—

ProductGithub.com/siyuan-note/siyuan/kernel

PublishedAug 15, 2026

First seenAug 15, 2026

Weakness typeCWE-287Improper authentication

How to fix

Update

github.com/siyuan-note/siyuan/kernel0.0.0-20260731131820-67bc300b6ea6 or later

Vendor advisories

github.com/siyuan-note/siyuan/security/advisories/GHSA-c8w8-3pqp-wr83

Affected products

Product	Affected versions	Fixed in
github.com/siyuan-note/siyuan/kernelGo	v < 0.0.0-20260731131820-67bc300b6ea6	0.0.0-20260731131820-67bc300b6ea6

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