Vulnerability · Published Aug 3, 2026 · Assigned by VulnCheck

CVE-2026-68587SiYuan before v3.7.3 Information Disclosure via getHeading*Transaction

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 0.3% (higher than 25% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)8.6High

Exploit odds (30 days)0.3%top 74.8% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

SiYuan versions before v3.7.3 contain an information disclosure vulnerability in the getHeadingDeleteTransaction, getHeadingLevelTransaction, and getHeadingInsertTransaction endpoints that return rendered block DOM without publish-access checks. Anonymous readers or publish RoleReader tokens can supply a heading block ID to read full rendered content of publish-disabled documents that should be restricted.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Go	github.com/siyuan-note/siyuan/kernel	0.0.0-20260721013353-69db783b782a	GHSA-69mh-gvh4-8gp7
Go	github.com/siyuan-note/siyuan/kernel	0.0.0-20260721013353-69db783b782a	GO-2026-6381

Affected products (as reported)

Vendor	Product	Versions
siyuan-note	siyuan	0 – before 3.7.3

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-69mh-gvh4-8gp7) vendor-advisory
VulnCheck Advisory: SiYuan before v3.7.3 Information Disclosure via getHeading*Transaction third-party-advisory