Path Traversal Vulnerability in BlenderMCP Affects File Security
CVE-2026-66004

6MEDIUM

Key Information:

Vendor

Ahujasid

Status
Blender-mcp
Vendor
CVE Published:
24 July 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-66004?

BlenderMCP prior to commit 30a3308 features a path traversal vulnerability within the download_polyhaven_asset method. This flaw enables attackers to write arbitrary files by injecting harmful traversal sequences into API response keys. If an attacker successfully executes a MITM (Man-In-The-Middle) attack or conducts prompt injections, they can manipulate file paths, such as '../../../../.bashrc', allowing them to overwrite sensitive files. This could lead to persistent code execution, ultimately undermining the integrity and security of the affected systems.

Affected Version(s)

blender-mcp 0 < 30a3308446cd8f81a9446e5a2ed657c0d8d86072

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-66004 - Proof of Concept

References

https://github.com/ahujasid/blender-mcp/issues/257
technical-descriptionexploit
https://github.com/ahujasid/blender-mcp/pull/258
issue-tracking
https://github.com/ahujasid/blender-mcp/commit/30a3308446...
patch

CVSS V4

Score:
6
Severity:
MEDIUM
Confidentiality:
None
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
High
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

YU SUN
.