TI-2026-29095 Aliases CVE-2026-40318 GHSA-vw86-c94w-v3x4

SiYuan: Publish Reader Path Traversal Delete via `removeUnusedAttributeView`

LOW 37CWE-24Published 2026-04-16 · Updated 2026-04-18

Key facts

Attack vector: Network
Privileges required: Low
User interaction: None
Attack complexity: Low
Impact type: —
Confidentiality · integrity · availability: None · Low · High
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00287 21st percentileScored 2026-11-07

Fix Fixed siyuan (siyuan-note): 3.6.4github.com/siyuan-note/siyuan/kernel (Go): 3.6.40.0.0-20260407035653-2f416e5253f1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
siyuan-note	siyuan	before 3.6.4	3.6.4	Patch available	CNA
—	github.com/siyuan-note/siyuan/kernel (Go)	before 3.6.40.0.0-20260407035653-2f416e5253f1	3.6.40.0.0-20260407035653-2f416e5253f1	Patch available	GHSA-vw86-c94w-v3x4

siyuan Vendorsiyuan-note Affected before 3.6.4 Fixed in 3.6.4 Patch available CNA
github.com/siyuan-note/siyuan/kernel (Go) Vendor— Affected before 3.6.40.0.0-20260407035653-2f416e5253f1 Fixed in 3.6.40.0.0-20260407035653-2f416e5253f1 Patch available GHSA-vw86-c94w-v3x4

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:b3log:siyuan::::::::	before 3.6.4	Vulnerable	siyuan-note

cpe:2.3:a:b3log:siyuan:*:*:*:*:*:*:*:* Versions before 3.6.4 Vulnerable ·siyuan-note

Remediation

Fix · CNA siyuan (siyuan-note) Fixed in 3.6.4
Fix · GHSA-vw86-c94w-v3x4 github.com/siyuan-note/siyuan/kernel (Go) Fixed in 3.6.40.0.0-20260407035653-2f416e5253f1 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2026-40318
2026-10-03 Alias added: GHSA-vw86-c94w-v3x4

References

Advisory 2

Other 2

TI-2026-26050 SiYuan has directory traversal within its publishing service CVSS 3.1CRITICAL 9.8
TI-2026-25256 SiYuan: Authorization Bypass Allows Arbitrary SQL Execution via Search API CVSS 3.1CRITICAL 9.8
TI-2024-35827 A SQL injection vulnerability was discovered in Siyuan 3.1.11 in /getHistoryItems. CVSS 3.1CRITICAL 9.8
TI-2024-35826 A SQL injection vulnerability has been identified in Siyuan 3.1.11 via the ids array parameter in /batchGetBlockAttrs. CVSS 3.1CRITICAL 9.8
TI-2024-35825 A SQL injection vulnerability has been identified in Siyuan 3.1.11 via the id parameter at /getAssetContent. CVSS 3.1CRITICAL 9.8
TI-2024-35824 A SQL injection vulnerability has been identified in Siyuan 3.1.11 via the notebook parameter in /searchHistory. CVSS 3.1CRITICAL 9.8

See all 54 →

Sources

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