CVE-2026-73045 HIGH

CVE-2026-73045: SiYuan before 3.7.4 Brute-Force via authFilePublishAccess

Vendor Siyuan-Note
Product siyuan
Weakness CWE-307 · Brute force
Published August 15, 2026
Last update August 18, 2026

CVSS base score

8.7/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality
Integrity

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

August 15, 2026 CVE published
August 18, 2026 Record updated