CVE-2026-72810
SiYuan before v3.7.4 Publish-Boundary Bypass via WebSocket
- State
- Published
- Severity
- 9.2 Critical
- Published
- Aug 14, 2026
- Updated
- Aug 18, 2026
- Reserved
- Aug 10, 2026
Description
SiYuan versions before v3.7.4 contain a publish-boundary bypass vulnerability in WebSocket broadcast sessions that allows anonymous readers to receive unfiltered edits. Attackers can establish a WebSocket connection to the publish surface and passively receive real-time content events including password-protected and forbidden documents without authentication.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 9.2 Critical | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N | VulnCheck |
| 3.1 | 8.6 High | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N | VulnCheck |
Weaknesses
- CWE-862 Missing Authorization
Affected Products
| Product | Versions |
|---|---|
siyuansiyuan-note |
|
References
- GitHub Security Advisory (GHSA-mw8r-mw84-88v2)vendor-advisory
- VulnCheck Advisory: SiYuan before v3.7.4 Publish-Boundary Bypass via WebSocketthird-party-advisory
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