CVE-2026-25992 HIGH

CVE-2026-25992: SiYuan has a File Read Interface Case Bypass Vulnerability

Vendor Siyuan-Note
Product siyuan
Weakness CWE-22 · Path traversal
Published February 10, 2026
Last update February 10, 2026

CVSS base score

7.5/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality High
Integrity None

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

What the vulnerability does

01Description

SiYuan is a personal knowledge management system. Prior to 3.5.5, the /api/file/getFile endpoint uses case-sensitive string equality checks to block access to sensitive files. On case-insensitive file systems such as Windows, attackers can bypass restrictions using mixed-case paths and read protected configuration files. This vulnerability is fixed in 3.5.5.

Key dates

02Disclosure timeline

February 10, 2026 CVE published
February 10, 2026 Record updated