knowns versions before 0.30.0 fail to validate filesystem paths in MCP tool arguments, allowing attackers to read, create, overwrite and delete files outside the project directory. Attackers can supply path arguments containing directory traversal sequences to access arbitrary Markdown files accessible to the server process.
History

Tue, 08 Sep 2026 13:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Tue, 08 Sep 2026 01:15:00 +0000

Type Values Removed Values Added
First Time appeared Knowns-dev
Knowns-dev knowns
Vendors & Products Knowns-dev
Knowns-dev knowns

Mon, 07 Sep 2026 23:15:00 +0000

Type Values Removed Values Added
Description knowns versions before 0.30.0 fail to validate filesystem paths in MCP tool arguments, allowing attackers to read, create, overwrite and delete files outside the project directory. Attackers can supply path arguments containing directory traversal sequences to access arbitrary Markdown files accessible to the server process.
Title knowns before 0.30.0 Path Traversal via MCP doc and memory tools
Weaknesses CWE-22
References
Metrics cvssV3_1

{'score': 8.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 8.7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published: 2026-09-07T23:03:16.548Z

Updated: 2026-09-08T12:44:26.129Z

Reserved: 2026-09-07T12:34:31.457Z

Link: CVE-2026-86439

cve-icon Vulnrichment

Updated: 2026-09-08T12:44:22.335Z

cve-icon NVD

Status : Deferred

Published: 2026-09-07T23:16:53.297

Modified: 2026-09-08T19:56:50.950

Link: CVE-2026-86439

cve-icon Redhat

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