CVE-2026-23851

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.

CVSS v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/siyuan-note/siyuan/commit/b2274baba2e11c8cf8901b0c5c871e5b27f1f6dd	Patch
https://github.com/siyuan-note/siyuan/commit/f8f4b517077b92c90c0d7b51ac11be1b34b273ad	Patch
https://github.com/siyuan-note/siyuan/issues/16860	Issue Tracking Patch
https://github.com/siyuan-note/siyuan/security/advisories/GHSA-94c7-g2fj-7682	Vendor Advisory Exploit Patch

Configurations

Configuration 1 (hide)

cpe:2.3:a:b3log:siyuan:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-01-19 20:15

Updated : 2026-01-30 15:12

NVD link : CVE-2026-23851

Mitre link : CVE-2026-23851

CVE.ORG link : CVE-2026-23851

JSON object : View

Products Affected

b3log

siyuan

CWE

CWE-22

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

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