Vulnerability in Siyuan-Note Siyuan
CVE-2026-73045
SiYuan before 3.7.4 contains an improper restriction of excessive authentication attempts vulnerability in the authFilePublishAccess endpoint that allows unauthenticated attackers to brute-force per-notebook publish passwords. Attackers can submit unbounded password guesses without rate limiting or CAPTCHA to gain access to password-protected published notebooks.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
Affected products
- Siyuan-note Siyuan — versions 0, 3.7.4
Weakness classification (CWE)
References
- disclosure@vulncheck.com (vendor-advisory)
- disclosure@vulncheck.com (third-party-advisory)
Frequently asked questions
- What is CVE-2026-73045?
- CVE-2026-73045 is a high-severity vulnerability in Siyuan-Note Siyuan, classified under Improper Restriction of Excessive Authentication Attempts. CVSS score: 7.5/10. Published 2026-08-15.
- How severe is CVE-2026-73045?
- High severity. CVSS v3 base score is 7.5 out of 10.