CVE-2026-72810: Missing Authorization in siyuan-note siyuan
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.
AI Analysis
Technical Summary
CVE-2026-72810 describes a missing authorization vulnerability in SiYuan note-taking software versions prior to v3.7.4. The issue occurs in the WebSocket broadcast mechanism where the publish boundary can be bypassed, allowing unauthenticated attackers to passively receive unfiltered edit events. This includes sensitive content from password-protected or access-restricted documents. The vulnerability has a CVSS 4.0 base score of 9.2, indicating critical severity with network attack vector, no privileges or user interaction required, and high impact on confidentiality and security capabilities.
Potential Impact
An attacker can connect anonymously to the WebSocket broadcast surface and receive real-time updates of document edits, including those from documents that should be protected by passwords or access restrictions. This results in a complete confidentiality breach of sensitive information without requiring authentication or user interaction.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict access to the WebSocket broadcast interface and monitor for unauthorized connections if possible.
CVE-2026-72810: Missing Authorization in siyuan-note siyuan
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.
CVSS v4.0
Score 9.2critical
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-72810 describes a missing authorization vulnerability in SiYuan note-taking software versions prior to v3.7.4. The issue occurs in the WebSocket broadcast mechanism where the publish boundary can be bypassed, allowing unauthenticated attackers to passively receive unfiltered edit events. This includes sensitive content from password-protected or access-restricted documents. The vulnerability has a CVSS 4.0 base score of 9.2, indicating critical severity with network attack vector, no privileges or user interaction required, and high impact on confidentiality and security capabilities.
Potential Impact
An attacker can connect anonymously to the WebSocket broadcast surface and receive real-time updates of document edits, including those from documents that should be protected by passwords or access restrictions. This results in a complete confidentiality breach of sensitive information without requiring authentication or user interaction.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict access to the WebSocket broadcast interface and monitor for unauthorized connections if possible.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-08-10T15:11:49.794Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a7f0282bf8831d539fec750
Added to database: 08/14/2026, 11:56:50 UTC
Last enriched: 08/14/2026, 12:26:12 UTC
Last updated: 08/15/2026, 03:02:41 UTC
Views: 11
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