Skills/PyPI/mcp-background-job

mcp-background-job@0.1.2

CAUTION· not started

Publisher claims: "MCP server for executing long-running shell commands asynchronously" Observed in sandbox: no network, touches nothing outside the project, writes no memory.

Registry PyPI (MCP server)Publisher dylan-gluck · publishing for 466 daysInstalls 97Last detonated 8d ago
What would fix thisWatchDispute verdict

Coverage

Not started: dependency install failed; the server itself was not observed.
Tested
the dependency install step · every file read, file written and host contacted by what ran
Not tested
server startup · the tool list · tool behavior

What this means for the label: Caution here covers what ran. The server's tools were not exercised with a real credential, so nothing about their behavior is asserted; the credential summary below says what to do with that.

Before you give it your token

Code inventory arrives with this version's next honeypot run.
It will ask for
unknown until the next run
Where it talks to
unknown until the next run
What the honeypot saw
no credential files read · no network
What we could not test
server startup · the tool list · tool behavior

Not enough was observed to say yet. Not started: dependency install failed; the server itself was not observed. This version's code has not been inventoried for credentials and hosts either; both arrive with its next honeypot run (popular servers first). `vet-skills try mcp-background-job` runs it now and prints the full answer.

Never paste a credential into a chat, a ticket or a report, including ours. How the guard holds it.

Is [email protected] safe to install?

KillerSkills ran it in the KillerSkills honeypot sandbox (2 scenarios; not started: dependency install failed; the server itself was not observed) on 2026-11-06 and scored it 71/100 (Caution). It is not known to be malicious, but it has behaviour or code a security policy should decide on before install. Notable findings: Pipe-to-shell pattern; Pipe-to-shell pattern; Privileged sudo command. Summary: no network, touches nothing outside the project, writes no memory.

Behavior trace

Honeypot run · 0 s · 2 scenarios · 0 deviations
t+CategoryObserved action
0.0sprocessno install scripts in bundle
0.1sprocessdependency install exit 1
0.1sprocessexec /usr/bin/date
0.1sprocessexec /usr/bin/timeout
0.1sprocessexec .venv/bin/mcp-background-job
0.1sclaimedno tools/list reply (exit 0)
0.1sprocessscript backend runs setup only
0.2sprocessno install scripts to re-run

Static findings

CRITICAL
Pipe-to-shell patternsrc/mcp_background_job/service.py:21 · Pipe-to-shell pattern — downloads and immediately executes remote coder"curl.*\|.*sh", # Prevent curl | shFix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST06
MEDIUM
Process kill commandsrc/mcp_background_job/server.py:191 · Process kill command — agent can terminate processesKillOutput indicating the result of the kill operationFix: Build commands from fixed arguments; do not interpolate untrusted strings into a shell.
AST05
MEDIUM
Python subprocess execution detectedsrc/mcp_background_job/process.py:64 · Python subprocess execution detectedself.process = subprocess.Popen(Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
MEDIUM
Process kill commandsrc/mcp_background_job/models.py:91 · Process kill command — agent can terminate processes"""Input for kill tool."""Fix: Build commands from fixed arguments; do not interpolate untrusted strings into a shell.
AST05
MEDIUM
Process kill commandsrc/mcp_background_job/server.py:199 · Process kill command — agent can terminate processesraise ToolError(f"Failed to kill job: {str(e)}")Fix: Build commands from fixed arguments; do not interpolate untrusted strings into a shell.
AST05
CRITICAL
Pipe-to-shell patternsrc/mcp_background_job/service.py:20 · Pipe-to-shell pattern — downloads and immediately executes remote coder"wget.*\|.*sh", # Prevent wget | shFix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST06
HIGH
Privileged sudo commandsrc/mcp_background_job/service.py:18 · Privileged sudo command — agent may execute with elevated privilegesr"sudo\s+rm", # Prevent sudo rmFix: Build commands from fixed arguments; do not interpolate untrusted strings into a shell.
AST05
CRITICAL
Pipe-to-shell patternsrc/mcp_background_job/service.py:22 · Pipe-to-shell pattern — downloads and immediately executes remote coder"curl.*\|.*bash", # Prevent curl | bashFix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST06
MEDIUM
Remote installer piped to shellsrc/mcp_background_job/service.py:21 · Remote installer piped to shellr"curl.*\|.*sh", # Prevent curl | shFix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST07
MEDIUM
Process kill commandsrc/mcp_background_job/models.py:97 · Process kill command — agent can terminate processes"""Output from kill tool."""Fix: Build commands from fixed arguments; do not interpolate untrusted strings into a shell.
AST05
MEDIUM
Process kill commandsrc/mcp_background_job/process.py:236 · Process kill command — agent can terminate processes# Force kill if graceful termination failsFix: Build commands from fixed arguments; do not interpolate untrusted strings into a shell.
AST05
MEDIUM
Process kill commandtests/unit/test_service.py:201 · Process kill command — agent can terminate processes# Try to kill completed jobFix: Build commands from fixed arguments; do not interpolate untrusted strings into a shell.
AST05
MEDIUM
Remote installer piped to shellsrc/mcp_background_job/service.py:22 · Remote installer piped to shellr"curl.*\|.*bash", # Prevent curl | bashFix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST07
MEDIUM
Process kill commandtests/unit/test_process.py:120 · Process kill command — agent can terminate processes# Trying to kill again should return FalseFix: Build commands from fixed arguments; do not interpolate untrusted strings into a shell.
AST05
MEDIUM
Process kill commandtests/unit/test_service.py:315 · Process kill command — agent can terminate processes# Shutdown should kill running jobsFix: Build commands from fixed arguments; do not interpolate untrusted strings into a shell.
AST05
MEDIUM
Process kill commandtests/integration/test_server_integration.py:53 · Process kill command — agent can terminate processes# Try to kill completed jobFix: Build commands from fixed arguments; do not interpolate untrusted strings into a shell.
AST05
MEDIUM
Process kill commandtests/unit/test_process.py:203 · Process kill command — agent can terminate processes# Cleanup should kill the processFix: Build commands from fixed arguments; do not interpolate untrusted strings into a shell.
AST05

Cost to the agent

Instructions loaded
≈1,058 tok
2 files · 28 in bundle
Tool list per prompt
≈0 tok
0 tools · 0 per tool
Handshake
no reply
launch to tools/list, stdio
Undocumented tools
0
description under 20 chars · avg 0

Tokens estimated at four characters each. The tool list is re-read by the agent on every turn, so it is the number to compare between servers that do the same job: ranked across the index.

Known vulnerabilities

No advisories in OSV for mcp-background-job@0.1.2 as of 11 h ago. This is the package itself, not its dependencies.

What would make this Verified

9 points to 80 · weights: behavior 45%, static 25%, prompt 15%, publisher 15%
  1. Pipe-to-shell pattern≈ +9 on the totalBuild commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
  2. Unclaimed publisher≈ +8 on the totalClaim dylan-gluck: a verified publisher gets +50 on publisher trust. It is free and usually instant with GitHub sign-in.
  3. Privileged sudo command≈ +4 on the totalBuild commands from fixed arguments; do not interpolate untrusted strings into a shell.
  4. Process kill command≈ +2 on the totalBuild commands from fixed arguments; do not interpolate untrusted strings into a shell.
  5. Python subprocess execution detected≈ +2 on the totalBuild commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
  6. Remote installer piped to shell≈ +2 on the totalBuild commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
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