Is CVE-2026-73054 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-73054?

CVE-2026-73054 has a CVSS v3 severity of HIGH (7.5).

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CVE-2026-73054

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.