BlenderMCP path traversal in download_polyhaven_asset allows arbitrary file writes
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 software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Python (PyPI) | blender-mcp | < 1.6.5 | 1.6.5 |
References
- https://nvd.nist.gov/vuln/detail/CVE-2026-66004
- https://github.com/ahujasid/blender-mcp/issues/257
- https://github.com/ahujasid/blender-mcp/pull/258
- https://github.com/ahujasid/blender-mcp/commit/30a3308446cd8f81a9446e5a2ed657c0d8d86072
- https://github.com/ahujasid/mcp-for-blender
- https://www.vulncheck.com/advisories/blendermcp-path-traversal-via-download-polyhaven-asset-api
- https://pypi.org/project/blender-mcp
- https://github.com/advisories/GHSA-4h8q-hh2j-755w
- CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N- Weakness (CWE)
CWE-22- Platform
- Python (PyPI)
- Package
blender-mcp- Disclosed
- 24.07.2026
- Updated
- 15.10.2026 18:17
Sources and licenses
OSV / GitHub Advisory Database - PYSEC-2026-4203 - PyPA Advisory Database; CC BY 4.0
OSV / GitHub Advisory Database - GHSA-4h8q-hh2j-755w - CC BY 4.0
Vulnerability history: blender-mcp
All published vulnerabilities of this package (Python (PyPI)), newest first. Shows whether this is a one-off slip or a package that needs watching.
This is the only known vulnerability of this package.
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