Vulnerability in Siyuan-Note Siyuan
CVE-2026-68584
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.
EPSS: 0.003 (24.0th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N.
Affected products
- Siyuan-note Siyuan — versions 0, 3.7.3
Weakness classification (CWE)
References
- disclosure@vulncheck.com (vendor-advisory)
- disclosure@vulncheck.com (third-party-advisory)
Frequently asked questions
- What is CVE-2026-68584?
- CVE-2026-68584 is a high-severity vulnerability in Siyuan-Note Siyuan, classified under Authentication Bypass Using an Alternate Path or Channel. CVSS score: 8.6/10. Published 2026-08-03.
- How severe is CVE-2026-68584?
- High severity. CVSS v3 base score is 8.6 out of 10.