CVE-2026-23850 HIGH

CVE-2026-23850: SiYuan vulnerable to arbitrary file read

Vendor Siyuan-Note
Product siyuan
Weakness CWE-22 · Path traversal
Published January 19, 2026
Last update January 20, 2026
View on NVD All CVEs

CVSS base score

7.8/10
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:L/VA:N/SC:N/SI:N/SA:N/E:P

What the vulnerability does

01Description

SiYuan is a personal knowledge management system. In versions prior to 3.5.4, the markdown feature allows unrestricted server side html-rendering which allows arbitrary file read (LFD). Version 3.5.4 fixes the issue.

Key dates

02Disclosure timeline

January 19, 2026 CVE published
January 20, 2026 Record updated