CVE-2026-66004: BlenderMCP path traversal in download_polyhaven_asset allows arbitrary file writes
(updated )
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.
References
- github.com/advisories/GHSA-4h8q-hh2j-755w
- github.com/ahujasid/blender-mcp/commit/30a3308446cd8f81a9446e5a2ed657c0d8d86072
- github.com/ahujasid/blender-mcp/issues/257
- github.com/ahujasid/blender-mcp/pull/258
- nvd.nist.gov/vuln/detail/CVE-2026-66004
- www.vulncheck.com/advisories/blendermcp-path-traversal-via-download-polyhaven-asset-api
Code Behaviors & Features
Detect and mitigate CVE-2026-66004 with GitLab Dependency Scanning
Secure your software supply chain by verifying that all open source dependencies used in your projects contain no disclosed vulnerabilities. Learn more about Dependency Scanning →