CVE-2026-72810 CRITICAL

CVE-2026-72810: SiYuan before v3.7.4 Publish-Boundary Bypass via WebSocket

Vendor Siyuan-Note

Product siyuan

Weakness CWE-862 · Missing authorization

Published August 14, 2026

Last update August 14, 2026

View on NVD All CVEs

CVSS base score

9.2/10

Attack vector Network

Attack complexity Low

Privileges required None

User interaction None

Confidentiality —

Integrity —

CVSS vector

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

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

August 14, 2026 CVE published

External resources

03References

NVD — National Vulnerability Database https://nvd.nist.gov/vuln/detail/CVE-2026-72810 CWE — Common Weakness Enumeration https://cwe.mitre.org/data/definitions/862.html AskarLabs — CWE-862 write-up Missing Authorization

Related vulnerabilities

04Related CVE

CVE-2026-66441 WordPress MultiVendorX plugin <= 5.0.10 - Broken Access Control vulnerability CVE-2026-7456 Udimi Tools <= 3.2 - Missing Authorization to Authenticated (Subscriber+) Plugin Configuration Reset via 'disconnect' AJAX Action CVE-2026-28188 WordPress Hydra Booking plugin <= 1.2.2 - Broken Access Control vulnerability CVE-2026-66466 WordPress StoreGrowth: Smart Sales Booster for WooCommerce | BOGO, Upsells, Direct Checkout, Quick View, Side Cart plugin <= 2.1.1 - Broken Access Control vulnerability CVE-2026-7529 wiseCampaign <= 1.1.16 - Missing Authorization to Unauthenticated Plugin Configuration Modification via REST API