CVE-2026-72810

critical · 9.2

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

0.5%

EPSS (exploit prob.)

43rd

EPSS percentile

2026-08-14

Published

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:X/V:X/RE:X/U:X

Weaknesses

CWE-862

References

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

Query this programmatically:

curl https://evil-db.io/api/v1/cve/CVE-2026-72810