CVE-2026-73054
SiYuan before v3.7.4 Authentication Bypass via WebSocket
CVSS Score
7.5
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-287 |
| Vendor | siyuan-note |
| Product | siyuan |
| Published | Aug 15, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None
Affected Versions
siyuan-note / siyuan
0 < 3.7.4
References
Credits
🔍 Shirshakhtml