---
id: CVE-2026-66004
aliases:
  - GHSA-4h8q-hh2j-755w
title: >-
  BlenderMCP path traversal in download_polyhaven_asset allows arbitrary file
  writes
summary: >-
  BlenderMCP path traversal in download_polyhaven_asset allows arbitrary file
  writes
severity: medium
cvss: 5.3
cwe:
  - CWE-22
vendor: blender-mcp
product: blender-mcp
ecosystem: pip
affected:
  - blender-mcp < 1.6.5
patched:
  - blender-mcp 1.6.5
published: '2026-07-24'
updated: '2026-10-02'
sourceUpdated: '2026-10-02T22:43:53Z'
source: GHSA
sourceUrl: 'https://github.com/advisories/GHSA-4h8q-hh2j-755w'
references:
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-66004'
  - url: 'https://github.com/ahujasid/blender-mcp/issues/257'
  - url: 'https://github.com/ahujasid/blender-mcp/pull/258'
  - url: >-
      https://github.com/ahujasid/blender-mcp/commit/30a3308446cd8f81a9446e5a2ed657c0d8d86072
  - url: >-
      https://www.vulncheck.com/advisories/blendermcp-path-traversal-via-download-polyhaven-asset-api
  - url: 'https://github.com/advisories/GHSA-4h8q-hh2j-755w'
tags:
  - ghsa
  - pip
epss: 0.00423
epssPercentile: 0.34322
ingestedAt: '2026-10-02T23:34:57.401Z'
---

## Overview

BlenderMCP before commit 30a3308 contains a path traversal vulnerability in the download_polyhaven_asset method that allows attackers to write arbitrary files by injecting traversal sequences in API response include keys. Attackers performing MITM attacks or prompt injection can supply malicious paths like '../../.bashrc' to overwrite sensitive files and achieve persistent code execution.

## Affected packages

- `blender-mcp < 1.6.5`

## Remediation

Upgrade to a patched release:

- `blender-mcp 1.6.5`