Medium 6.2Published Oct 25, 2026

CVE-2026-116168SiYuan before v3.8.7 Path Traversal Local File Read via MCP Asset Tool

Updated under an hour ago (Oct 28, 2026, 3:23 AM ET)

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It affects siyuan-note siyuan. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for siyuan-note siyuan

Exploited in the last 30 days

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.

CVSS: 6.2 MEDIUM (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Weakness (CWE): CWE-22
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulnCheck
NVD analysis: Deferred
Record last updated: Oct 25, 2026
First seen by InfoSec Signals: Oct 25, 2026

Affected products

Affected products

siyuan-note siyuan siyuan_note:siyuan (from the name)	before 3.8.7; 3.8.7 not affected	CNA record

References

References

https://github.com/siyuan-note/siyuan/security/advisories/GHSA-q768-4j87-gf3w	vendor-advisory
https://www.vulncheck.com/advisories/siyuan-before-3.8.7-path-traversal-local-file-read-via-mcp-asset-tool	third-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.