Log in Start free

Vulnerability · Published Jan 19, 2026 · Assigned by GitHub_M

CVE-2026-23851SiYuan Vulnerable to Arbitrary File Read via File Copy Functionality

High 8.3

In plain English

A high-severity path traversal in siyuan from siyuan-note. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 44% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 4.0)8.3High
Exploit odds (30 days)0.5%top 55.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

SiYuan is a personal knowledge management system. Versions prior to 3.5.4 contain a logic vulnerability in the /api/file/globalCopyFiles endpoint. The function allows authenticated users to copy files from any location on the server's filesystem into the application's workspace without proper path validation. The vulnerability exists in the api/file.go source code. The function globalCopyFiles accepts a list of source paths (srcs) from the JSON request body. While the code checks if the source file exists using filelock.IsExist(src), it fails to validate whether the source path resides within the authorized workspace directory. Version 3.5.4 patches the issue.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Gogithub.com/siyuan-note/siyuan/kernel0.0.0-20260118092521-f8f4b517077bGHSA-94c7-g2fj-7682
Gogithub.com/siyuan-note/siyuan/kernel0.0.0-20260118092521-f8f4b517077bGO-2026-4346

Affected products (as reported)

VendorProductVersions
siyuan-note siyuan < 3.5.4

Weakness: CWE-22 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N

References