Vulnerability · Published Aug 13, 2026 · Assigned by VulnCheck

CVE-2026-73606SiYuan before v3.7.4 Information Disclosure via getRefIDs

Medium 5.8

In plain English

A medium-severity authorization bypass via user-controlled key 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 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: poc

Attack toolingNoneno public tooling known

Official description

SiYuan versions before v3.7.4 contain an information disclosure vulnerability in the /api/block/getRefIDs endpoint that fails to check password-protected document tiers. Unauthenticated readers can discover that password-protected documents reference specific blocks and obtain block identifiers without entering the document password.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Go	github.com/siyuan-note/siyuan/kernel	0.0.0-20260812083335-251596fc0de2	GHSA-vg99-7gj7-2fr5
Go	github.com/siyuan-note/siyuan/kernel	0.0.0-20260812083335-251596fc0de2	GO-2026-6635

Affected products (as reported)

Vendor	Product	Versions
siyuan-note	siyuan	0 – before 3.7.4

Weakness: CWE-639 · 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-vg99-7gj7-2fr5) vendor-advisory
VulnCheck Advisory: SiYuan before v3.7.4 Information Disclosure via getRefIDs third-party-advisory