What’s Vulnerable › Vulnerabilities

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

• Severity: high (CVSS 8.6 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-03 · updated 2026-10-23
• Weakness: CWE-288

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 products

• siyuan-note siyuan: before 3.7.3 — fixed in 3.7.3

How to fix

Upgrade to a fixed version: siyuan-note siyuan 3.7.3. Check the vendor advisory for mitigations.

References

• https://github.com/siyuan-note/siyuan/security/advisories/GHSA-7j72-f6wg-cxw6
• https://www.vulncheck.com/advisories/siyuan-before-authentication-bypass-via-content-endpoints

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