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Vulnerability record · CVE-2026-72810 · published 14 August 2026

CVE-2026-72810: Missing authorization vulnerability

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.

9.2 CVSS 4.0 Critical EPSS 0.54% · top 57.0% CWE-862 · Missing authorization Deferred
9.2CVSS 4.0 base score
0.54%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
3References
26 Aug 2026Last modified by NVD

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:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

LinkTags
https://github.com/siyuan-note/siyuan/security/advisories/GHSA-mw8r-mw84-88v2
https://www.vulncheck.com/advisories/siyuan-before-publish-boundary-bypass-via-websocket
https://github.com/siyuan-note/siyuan/security/advisories/GHSA-mw8r-mw84-88v2

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Source: NIST National Vulnerability Database (record CVE-2026-72810), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.