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CVE-2026-40318

SiYuan: Publish Reader Path Traversal Delete via `removeUnusedAttributeView`

Published: Apr 16, 2026Updated: Apr 20, 2026 Sources: CVE List NVDCWE-24
NVD MITRE
8.5CVSSHIGH
EPSS Score
0.3%
Top 79.8%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available

Description

SiYuan is an open-source personal knowledge management system. In versions 3.6.3 and prior, the /api/av/removeUnusedAttributeView endpoint constructs a filesystem path using the user-controlled id parameter without validation or path boundary enforcement. An attacker can inject path traversal sequences such as ../ into the id value to escape the intended directory and delete arbitrary .json files on the server, including global configuration files and workspace metadata. This issue has been fixed in version 3.6.4.

CVSS Vector Breakdown

AV:NAC:LPR:LUI:NS:CC:NI:LA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:CScope
Changed
Impact
C:NConfidentiality
None
I:LIntegrity
Low
A:HAvailability
High
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Weaknesses

CWE-24

Affected Products

siyuansiyuan-note
siyuanb3log
On-premWeb App
Web & CMS Plugins / cms-core
b3logoss-projectWeb & CMS Pluginsaka b3log

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

References

https://github.com/siyuan-note/siyuan/security/advisories/GHSA-vw86-c94w-v3x4
github.com
https://github.com/siyuan-note/siyuan/releases/tag/v3.6.4
github.com

Timeline

Published
Apr 16, 2026
Last Updated
Apr 20, 2026

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