Vulnerability · Published Jul 24, 2026 · Assigned by VulnCheck

CVE-2026-66004BlenderMCP Path Traversal via download_polyhaven_asset API

Medium 5.3

In plain English

A medium-severity path traversal in blender-mcp from ahujasid. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 22% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)5.3Medium

Exploit odds (30 days)0.3%top 77.6% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

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 & fixed versions

Ecosystem	Package	Fixed in	Advisory
PyPI	blender-mcp	1.6.5	GHSA-4h8q-hh2j-755w
PyPI	blender-mcp	1.6.5	PYSEC-2026-4203

Affected products (as reported)

Vendor	Product	Versions
ahujasid	blender-mcp	0 – before 30a3308446cd8f81a9446e5a2ed657c0d8d86072

Weakness: CWE-22 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N

References

Researcher Disclosure technical-description, exploit, issue-tracking
Pull Request issue-tracking, patch
Patch Commit patch
https://www.vulncheck.com/advisories/blendermcp-path-traversal-via-download-polyhaven-asset-api third-party-advisory