CVE Tools
Home/Vulnerability/CVE-2026-40318

CVE-2026-40318

SiYuan: Publish Reader Path Traversal Delete via `removeUnusedAttributeView`

Published: Apr 16, 2026Updated: Apr 16, 2026 Sources: CVE List NVD
NVD MITRE
8.5CVSS
HIGH

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.

EPSS Score
N/A
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available

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

Weaknesses

CWE-24

Affected Products

siyuan
siyuan-note

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 16, 2026

Unlock Complete Vulnerability Intelligence

Get the full picture for CVE-2026-40318 and every CVE in our database. Create a free account — no credit card required.

Create Free Account
AI-powered analysis
Plain-language impact assessment and exploitation scenario
Attack graph visualization
Interactive attack path and kill chain mapping
Exploit details & PoC links
ExploitDB, Metasploit, GitHub PoCs with direct links
Nuclei scanner templates
Ready-to-use vulnerability scanner templates
Full remediation guide
Patch instructions, workarounds, and compliance impact
Interactive AI chat
Ask questions about this vulnerability in natural language
Related vulnerabilities
Semantically similar CVEs and attack patterns
REST API & MCP access
Integrate vulnerability data into your workflows