by Kastro
Paper/Archive/CVE-2026-72810

CVE-2026-72810

siyuan-note siyuan — SiYuan before v3.7.4 Publish-Boundary Bypass via WebSocket

EPSS 0.5%public exploitCVSS 9.2
critical.is priorityof 100
47
CVSS 9.2 (CNA)9.2 / 10 × 3027.6Not in CISA KEV+300.0EPSS percentile 45.3.453 × 209.1Exploit: SSVC poc+1010.0SSVC exploitation: poc+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
siyuan< 3.7.43.7.4CNA

Scores by source

VulnCheck (CNA)9.2CVSS: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 (CNA)8.6CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
CISA ADPSSVCExploitation: poc · Automatable: yes · Technical impact: partial

References

exploitgithub.com/siyuan-note/siyuan/security/advisories/GHSA-mw8r-mw84-88v2writeupvulncheck.com/advisories/siyuan-before-publish-boundary-bypass-via-websocket