Vulnerability · Published Aug 14, 2026 · Assigned by VulnCheck

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

High 8.6

In plain English

A high-severity missing authorization in siyuan from siyuan-note. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 45% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)8.6High

Exploit odds (30 days)0.5%top 54.5% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Go	github.com/siyuan-note/siyuan/kernel	0.0.0-20260723013612-ba948639d7f6	GHSA-mw8r-mw84-88v2
Go	github.com/siyuan-note/siyuan/kernel	0.0.0-20260723013612-ba948639d7f6	GO-2026-6400

Affected products (as reported)

Vendor	Product	Versions
siyuan-note	siyuan	0 – before 3.7.4

Weakness: CWE-862 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N

References

GitHub Security Advisory (GHSA-mw8r-mw84-88v2) vendor-advisory
VulnCheck Advisory: SiYuan before v3.7.4 Publish-Boundary Bypass via WebSocket third-party-advisory