Detonation LabsBehavioral security for the AI agent supply chain

Verdict

Could not run: not tested

We could not start this server, so none of its behavior was tested. It said: ModuleNotFoundError: No module named 'mcp.server.fastmcp'. This is mcp 2.x, where FastMCP was renamed to MCPServer (from mcp.server.mcpserver import MCPServer) and other APIs changed

0 findings. Scanned 26 Oct 2026 by detonator 0.5.1.

Target
p10
Source
github
SHA-256
d2b3c6f84e5726ff
Files
3
RecommendationReview

We could not start it, so nothing was tested. Treat it as unverified.

What this package does

observed across 3 runs
  1. Package p10 3 files · MCP server
  2. Install No install stepFiles were copied in as they are.
  3. Runs as PYTHONPATH=skill/.detonator/site python3 skill/main.py
  4. What it reached
    Network

    No connections.

    Credentials

    None of the planted fake keys were touched.

    Files written

    Nothing outside its own folder.

We planted fake AWS, SSH, npm and GitHub keys and a .env file before every run. Red means something left or was planted to run later.

Findings

No findings. Detonator observed no malicious or suspicious behavior in the runs below.

Process tree

run mcp:baseline

Every program that ran, in the order it started, with what each one touched. Red marks the path to a leak or a planted file.

Show process tree
  • runbash -c mkdir -p skill/.detonator/tmp && TMPDIR=$PWD/skill/.deton...
    • runmkdir -p skill/.detonator/tmp
    • runpython3 -m pip install -q --no-index
      • runlsb_release -a
        • rungetopt --name lsb_release -o hvidrcas -l
        • runcut -c1
        • runtr [:lower:] [:upper:]
        • runcut -c2-
        • runtr [:upper:] [:lower:] ×2
      • rununame -rs
  • runbash -c PYTHONPATH=skill/.detonator/site python3 skill/main.py
    • runpython3 skill/main.py
      • rundpkg-divert --list <skill>/main.py
      • runfgrep -lxm 1 -- <skill>/main.py /var/lib/dpkg/info/node-defaults.list
        • rungrep -F -lxm 1 -- <skill>/main.py
      • runfgrep -lxm 1 -- <skill>/main.py /var/lib/dpkg/info/libintl-perl.list
        • rungrep -F -lxm 1 -- <skill>/main.py
      • runfgrep -lxm 1 -- <skill>/main.py /var/lib/dpkg/info/node-convert-source-map.list
        • rungrep -F -lxm 1 -- <skill>/main.py
      • runfgrep -lxm 1 -- <skill>/main.py /var/lib/dpkg/info/node-serialize-javascript.list
        • rungrep -F -lxm 1 -- <skill>/main.py
      • runfgrep -lxm 1 -- <skill>/main.py /var/lib/dpkg/info/node-colors.list
        • rungrep -F -lxm 1 -- <skill>/main.py
      • runfgrep -lxm 1 -- <skill>/main.py /var/lib/dpkg/info/command-not-found.list
        • rungrep -F -lxm 1 -- <skill>/main.py
      • runfgrep -lxm 1 -- <skill>/main.py /var/lib/dpkg/info/packagekit-tools.list
        • rungrep -F -lxm 1 -- <skill>/main.py
      • runfgrep -lxm 1 -- <skill>/main.py /var/lib/dpkg/info/node-iconv-lite.list
        • rungrep -F -lxm 1 -- <skill>/main.py
      • runfgrep -lxm 1 -- <skill>/main.py /var/lib/dpkg/info/node-y18n.list
        • rungrep -F -lxm 1 -- <skill>/main.py
      • runfgrep -lxm 1 -- <skill>/main.py /var/lib/dpkg/info/dbus-daemon.list
        • rungrep -F -lxm 1 -- <skill>/main.py
      • runfgrep -lxm 1 -- <skill>/main.py /var/lib/dpkg/info/libblockdev-utils3:amd64.list
        • rungrep -F -lxm 1 -- <skill>/main.py

Exploration log

3 runs
  1. mcp:baseline ok · 35.7s

    no new behavior · server did not complete the handshake: no response; server crashed: ModuleNotFoundError: No module named 'mcp.server.fastmcp'. This is mcp 2.x, where FastMCP was renamed to MCPServer (from mcp.server.mcpserver import MCPServer) and other APIs changed; see the migration guide at https://py.sdk.modelc

  2. mcp:time-travel ok · 32.1s

    no new behavior · server did not complete the handshake: no response; server crashed: ModuleNotFoundError: No module named 'mcp.server.fastmcp'. This is mcp 2.x, where FastMCP was renamed to MCPServer (from mcp.server.mcpserver import MCPServer) and other APIs changed; see the migration guide at https://py.sdk.modelc

  3. mcp:ci-github ok · 29.8s

    no new behavior · server did not complete the handshake: no response; server crashed: ModuleNotFoundError: No module named 'mcp.server.fastmcp'. This is mcp 2.x, where FastMCP was renamed to MCPServer (from mcp.server.mcpserver import MCPServer) and other APIs changed; see the migration guide at https://py.sdk.modelc

mcp: coverage plateau (2 runs with no new behavior)

Note

Observed behavior only. A clean result does not prove a package is safe. Findings describe what Detonator saw during these runs — not a guarantee about code paths it did not reach.