Vulnerability · Published Aug 3, 2026 · Assigned by VulnCheck

CVE-2026-68584SiYuan before v3.7.3 Authentication Bypass via Content Endpoints

High 8.6

In plain English

A high-severity authentication bypass 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 54.7% 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 authentication bypass vulnerability in publish mode where content-returning endpoints getHeadingChildrenDOM, getHeading*Transaction, and getBacklinkDoc perform no password check despite protecting the primary getDoc endpoint. Anonymous attackers can retrieve full content of password-protected documents by obtaining internal block IDs from reader-accessible endpoints and calling unprotected content endpoints to bypass the password gate.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Go	github.com/siyuan-note/siyuan/kernel	0.0.0-20260721020826-2d069dce84a2	GHSA-7j72-f6wg-cxw6
Go	github.com/siyuan-note/siyuan/kernel	0.0.0-20260721020826-2d069dce84a2	GO-2026-6382

Affected products (as reported)

Vendor	Product	Versions
siyuan-note	siyuan	0 – before 3.7.3

Weakness: CWE-288 · 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-7j72-f6wg-cxw6) vendor-advisory
VulnCheck Advisory: SiYuan before v3.7.3 Authentication Bypass via Content Endpoints third-party-advisory