CVE-2026-7159: Mkdocs mcp plugin Path Traversal Vulnerability

MODERATE
Advisory Identifier: GHSA-wfr3-hf93-qgg3
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CVSS 7.3
CWE-22
Published
Advisory Summary

CVE-2026-7159 is a MODERATE (CVSS 7.3) path traversal vulnerability (CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')) affecting Mkdocs mcp plugin libraries in the PyPI ecosystem. The issue involves mkdocs-mcp-plugin has a path traversal issue. Remediation is available in the latest vendor maintenance releases.

CVE-2026-7159 at a Glance

CVE Identifier CVE-2026-7159
GHSA Identifier GHSA-wfr3-hf93-qgg3
Severity MODERATE
CVSS v3.1 Base Score 7.3
CWE Classification CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Affected Product Mkdocs mcp plugin
Package Ecosystem PyPI
Published Date
Last Updated

Security Impact

CVSS: 7.3

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality Low (C:L)
Integrity Low (I:L)
Availability Low (A:L)

How to Fix CVE-2026-7159

To remediate this vulnerability, upgrade all affected Mkdocs mcp plugin dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

mkdocs-mcp-plugin fixed: Latest secure release 
pip install mkdocs-mcp-plugin>=Latest secure release
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

pip show mkdocs-mcp-plugin

How to Check if You Are Affected

To determine whether your Python environment is affected by CVE-2026-7159, inspect your installed packages using pip:

pip show mkdocs-mcp-plugin

Analyze the terminal output to locate any version of Mkdocs mcp plugin in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), your application is affected.

Note: The pip show mkdocs-mcp-plugin command checks currently installed packages in your active Python environment.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal'), where the product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. In Mkdocs mcp plugin, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

A vulnerability was found in douinc mkdocs-mcp-plugin up to 0.4.1. This affects the function read_document/list_documents of the file server.py. Performing a manipulation of the argument docs_dir/file_path results in path traversal. The attack is possible to be carried out remotely. The exploit has been made public and could be used. The vendor confirms, that the "fix will be published within a few days."

CVE-2026-7159 Affected Mkdocs mcp plugin Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
mkdocs-mcp-plugin
pypi/mkdocs-mcp-plugin
PyPI
≤ 0.4.1

References

NVD — CVE-2026-7159 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-7159
Mkdocs mcp plugin Source Repository REPOSITORY
https://github.com/douinc/mkdocs-mcp-plugin/issues/6
Mkdocs mcp plugin Source Repository REPOSITORY
https://github.com/douinc/mkdocs-mcp-plugin/issues/6#issuecomment-4223718119
Mkdocs mcp plugin Source Repository REPOSITORY
https://github.com/douinc/mkdocs-mcp-plugin
vuldb.com/submit/802063 WEB
https://vuldb.com/submit/802063
vuldb.com/vuln/359758 WEB
https://vuldb.com/vuln/359758
vuldb.com/vuln/359758/cti WEB
https://vuldb.com/vuln/359758/cti

Frequently Asked Questions

What is CVE-2026-7159?
CVE-2026-7159 is a security vulnerability in Mkdocs mcp plugin involving mkdocs-mcp-plugin has a Path Traversal issue under CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal').
Which Mkdocs mcp plugin versions are affected?
Affected versions include releases prior to current release patches across affected packages: mkdocs-mcp-plugin.
What version fixes CVE-2026-7159?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is mkdocs-mcp-plugin affected?
Yes, mkdocs-mcp-plugin is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.
What is the CVSS score of CVE-2026-7159?
CVE-2026-7159 has a CVSS v3.1 base score of 7.3 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L.
What CWE is associated with CVE-2026-7159?
CVE-2026-7159 is classified under CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') (The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.).
How can I check PyPI dependencies for CVE-2026-7159?
Run the dependency tree command: 'pip show mkdocs-mcp-plugin'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-wfr3-hf93-qgg3",
  "modified" : "2026-05-06T19:02:37Z",
  "published" : "2026-04-28T00:31:40Z",
  "aliases" : [ "CVE-2026-7159" ],
  "summary" : "mkdocs-mcp-plugin has a Path Traversal issue",
  "details" : "A vulnerability was found in douinc mkdocs-mcp-plugin up to 0.4.1. This affects the function read_document/list_documents of the file server.py. Performing a manipulation of the argument docs_dir/file_path results in path traversal. The attack is possible to be carried out remotely. The exploit has been made public and could be used. The vendor confirms, that the \"fix will be published within a few days.\"",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L"
  }, {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "mkdocs-mcp-plugin"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "0.4.1"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-7159"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/douinc/mkdocs-mcp-plugin/issues/6"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/douinc/mkdocs-mcp-plugin/issues/6#issuecomment-4223718119"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/douinc/mkdocs-mcp-plugin"
  }, {
    "type" : "WEB",
    "url" : "https://vuldb.com/submit/802063"
  }, {
    "type" : "WEB",
    "url" : "https://vuldb.com/vuln/359758"
  }, {
    "type" : "WEB",
    "url" : "https://vuldb.com/vuln/359758/cti"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-22" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-05-06T19:02:37Z",
    "nvd_published_at" : "2026-04-27T22:16:18Z"
  }
}