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Security audit

Blender MCP Plus

Security checks for vulnerabilities and agentic risk

Overview

The skill’s Blender automation capabilities are clearly disclosed and fit its purpose, though installation requires trusting third-party code.

Verify the third-party server before installation and pin a reviewed package version or Git commit in every client configuration. Its executable code was not included in this review. Save project copies, use trusted scenes, and consider an isolated environment because Python execution has your account's permissions. Keep port 9876 local.

A.I.G

Vulnerability Patterns
  • Skill Instruction HijackingAlters the agent's session goals or safety constraints when the skill loads
  • Agent Memory PoisoningWrites attacker-controlled rules into memory that affect later sessions
  • Remote Payload Retrieval and ExecutionFetches external code whose behavior can change after review
  • Embedded Malicious CodeShips malicious scripts inside the skill and executes them locally
  • Unauthorized Access and Privilege EscalationObtains permissions beyond the task's legitimate needs

SkillSpector

Vulnerability Patterns
  • Supply ChainUnpinned Dependencies, External Script Fetching, Obfuscated Code
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
  • Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
  • Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access
  • Excessive AgencyUnrestricted Tool Access, Autonomous Decision Making, Scope Creep
Findings (2)

MCP server referenced without pinned version: 'uvx blender-mcp-plus'.

Medium
Category
MCP Rug Pull
Confidence
98% confidence
Finding

The command runs a PyPI MCP package without specifying a version, allowing fresh installations or later resolutions to execute a changed release without review. A compromised publisher or malicious release could execute code with the user's permissions; the persistent MCP client configurations repeat this unpinned dependency, increasing exposure, although no malicious intent is evident.

Content

No source excerpt is available for this finding.

MCP server referenced without pinned version: 'uvx --from git'.

Medium
Category
MCP Rug Pull
Confidence
99% confidence
Finding

The Git installation command specifies no immutable revision, so it builds and executes code from the repository's changing default branch. A compromised maintainer account or malicious upstream change could introduce arbitrary code during installation or server startup; the Blender workflow's user-level execution capabilities increase the consequences, and the documented localhost restrictions do not mitigate this supply-chain risk.

Content

No source excerpt is available for this finding.