Vulnerability · Published Aug 12, 2026 · Assigned by VulnCheck

CVE-2026-72800SiYuan before v3.7.4 Information Disclosure via Unfiltered API

Medium 5.8

In plain English

A medium-severity missing authorization in siyuan from siyuan-note. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 26% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)5.8Medium

Exploit odds (30 days)0.3%top 74.3% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

SiYuan versions before v3.7.4 fail to apply publish-access filtering to the getAttributeViewKeysByID endpoint, allowing authenticated readers to retrieve complete database column schemas including descriptions, select vocabularies, and template expressions. Additionally, getBlockDefIDsByRefText and getBlockRelevantIDs endpoints enumerate workspace-wide block IDs without publish scoping, enabling attackers to discover valid block identifiers across publish boundaries and access content from hidden or password-protected documents.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Go	github.com/siyuan-note/siyuan/kernel	0.0.0-20260724103335-f36331956ae9	GHSA-5fhr-f75j-8wr9
Go	github.com/siyuan-note/siyuan/kernel	0.0.0-20260724103335-f36331956ae9	GO-2026-6395

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:L/I:N/A:N

References

GitHub Security Advisory (GHSA-5fhr-f75j-8wr9) vendor-advisory
VulnCheck Advisory: SiYuan before v3.7.4 Information Disclosure via Unfiltered API third-party-advisory