CVE-2026-40318

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 v3 8.5 HIGH

8.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.1 / Impact : 4.7

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact LOW

Availability Impact HIGH

Scope CHANGED

References

Link	Resource
https://github.com/siyuan-note/siyuan/releases/tag/v3.6.4	Release Notes
https://github.com/siyuan-note/siyuan/security/advisories/GHSA-vw86-c94w-v3x4	Third Party Advisory

Configurations

Configuration 1 (hide)

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

History

No history.

Information

Published : 2026-04-16 23:16

Updated : 2026-06-17 10:45

NVD link : CVE-2026-40318

Mitre link : CVE-2026-40318

CVE.ORG link : CVE-2026-40318

JSON object : View

Products Affected

b3log

siyuan

CWE

CWE-24

Path Traversal: '../filedir'

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