CVE-2026-73054CWE-287

CVE-2026-73054

High · published August 16, 2026

CVSS v3.1
7.5
EPSS
1%
Percentile
44.6
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CVSS v4.0
8.7 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
EPSS
0.00539 · 44.6th percentile
Weakness
CWE-287 · Improper Authentication
Published
2026-08-16T02:16Z
References (3)
https://github.com/siyuan-note/siyuan/security/advisories/GHSA-c8w8-3pqp-wr83 · [email protected]https://www.vulncheck.com/advisories/siyuan-before-authentication-bypass-via-websocket · [email protected]https://github.com/siyuan-note/siyuan/security/advisories/GHSA-c8w8-3pqp-wr83 · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 15 AUG 21:44Z
    SiYuan before v3.7.4 Authentication Bypass via WebSocket
    cvelistv5