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CVE-2026-23851

SiYuan Vulnerable to Arbitrary File Read via File Copy Functionality

Published: Jan 19, 2026Updated: Jan 30, 2026 Sources: CVE List NVD GHSACWE-22
NVD MITRE
6.5CVSSMEDIUM
EPSS Score
0.4%
Top 65.4%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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.

CVSS Vector Breakdown

AV:NAC:LPR:LUI:NS:UC:HI:NA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:NIntegrity
None
A:NAvailability
None
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Weaknesses

CWE-22

Affected Products

siyuansiyuan-note
siyuanb3log
On-premWeb App
Web & CMS Plugins / cms-core
github.com/siyuan-note/siyuan/kernelGoOSS Libraries
b3logoss-projectWeb & CMS Pluginsaka b3log
gopackage-ecosystemOSS Libraries

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available

MITRE ATT&CK

2 techniques
Collection
Discovery
View detailed technique mapping

References

https://github.com/siyuan-note/siyuan/security/advisories/GHSA-94c7-g2fj-7682
github.com
https://github.com/siyuan-note/siyuan/issues/16860
github.com
https://github.com/siyuan-note/siyuan/commit/b2274baba2e11c8cf8901b0c5c871e5b27f1f6dd
github.com
and 3 more references View all →

Timeline

Published
Jan 19, 2026
Last Updated
Jan 30, 2026

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