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CVE-2026-116168 Details

ANALYZED

This CVE record has been analyzed and enriched by NVDAPI.com as an independent party.

Description

SiYuan before 3.8.7 contains a path traversal vulnerability in the MCP asset tool because validateAssetUploadPaths relies on an incomplete sensitive-path blacklist that omits .env and other secret files. Authenticated attackers driving the MCP asset upload action can copy such local files into the workspace and read them back via /assets/ over HTTP.

Metrics

CVSS 3.x Severity and Vector Strings:

VolerionCVSS-B:6.5 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

CNA: [email protected]CVSS-B:6.2 MEDIUMVector:CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/siyuan-note/siyuan/security/advisories/GHSA-q768-4j87-gf3w	CISA-ADP	AdvisoryExploitTechnical AnalysisVendor
https://github.com/siyuan-note/siyuan/security/advisories/GHSA-q768-4j87-gf3w	[email protected]	AdvisoryExploitTechnical AnalysisVendor
https://www.vulncheck.com/advisories/siyuan-before-3.8.7-path-traversal-local-file-read-via-mcp-asset-tool	[email protected]	AdvisoryVendor

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-22	Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')	[email protected]

Affected Products

Product	Versions
SiYuan	<= 3.8.6 (semver)
CPE cpe:2.3:a:b3log:siyuan:::::::: Remediation Upgrade: v3.8.7moderate effort

Change History

3 change records found show changes

Date	Action	Recorded By
Nov 4, 2026	CVE Modified	CISA-ADP
Oct 25, 2026	CVE Modified	[email protected]
Oct 25, 2026	New CVE Received	[email protected]