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THREAT OPS › Threat News › [NVD] CVE-2026-73054 (HIGH 7.5) — 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

[NVD] CVE-2026-73054 (HIGH 7.5) — 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

mednvdPublished 2026-08-15

CVE-2026-73054 CVSS: 7.5 HIGH Published: 2026-08-15T22:16:55.290

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

Indicators of compromise

CVE-2026-73054cve

Original source: https://nvd.nist.gov/vuln/detail/CVE-2026-73054