mcp-sentinel-cli@0.3.0
CAUTION· not startedPublisher claims: "Security scanner for MCP (Model Context Protocol) servers" Observed in sandbox: no network, touches nothing outside the project, writes no memory.
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
- It will ask for
- no credential variables read in the code
- Where it talks to
- no vendor host named in the codeAlso githubusercontent.com — not the publisher's domain; check what for before connecting.
- What the honeypot saw
- no credential files read · no network
- What we could not test
- server startup · the tool list · tool behavior
Connect it under the guard. Not started: dependency install failed; the server itself was not observed. The code names no credential variable; the guard pins the network to what the honeypot saw and logs every call.
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 2026-11-09 and scored it 72/100 (Caution). It is not known to be malicious, but it has behaviour or code a security policy should decide on before install. Notable findings: Hidden zero-width characters detected; Bidirectional text override characters detected; OS command execution function call detected. Summary: no network, touches nothing outside the project, writes no memory.
Behavior trace
Honeypot run · 0 s · 2 scenarios · 0 deviationsStatic findings
" subprocess.run(cmd, shell=True) # mcp-sentinel: ignore[MCP102]\n"Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out."subprocess.run('x', shell=True)\n"Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out."[-]"Fix: Keep SKILL.md to visible, descriptive text. Remove comments and encoded text that address the agent." subprocess.run(cmd, shell=True)\n"Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out."[-]"Fix: Replace encoded or assembled strings with plain literals and remove undeclared network calls." os.system(cmd) # mcp-sentinel: ignore\n"Fix: Build commands from fixed arguments; do not interpolate untrusted strings into a shell." os.system(cmd)\n"Fix: Build commands from fixed arguments; do not interpolate untrusted strings into a shell." subprocess.run(cmd, shell=True) # mcp-sentinel: ignore[MCP102]\n"Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.subprocess.run(cmd, shell=True) # mcp-sentinel: ignore[MCP102]Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.subprocess.run(cmd, shell=True) # mcp-sentinel: ignoreFix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.the calling LLM ("ignore previous instructions", hidden invisible unicode,Fix: Keep SKILL.md to visible, descriptive text. Remove comments and encoded text that address the agent."os.system('y')\n",Fix: Build commands from fixed arguments; do not interpolate untrusted strings into a shell."MCP102", Severity.HIGH, "os.system() call",Fix: Build commands from fixed arguments; do not interpolate untrusted strings into a shell.Cost to the agent
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-sentinel-cli@0.3.0 as of 5d ago. This is the package itself, not its dependencies.
What would make this Verified
8 points to 80 · weights: behavior 45%, static 25%, prompt 15%, publisher 15%- Unclaimed publisher≈ +8 on the totalClaim yashkantg: a verified publisher gets +50 on publisher trust. It is free and usually instant with GitHub sign-in.
- Hidden zero-width characters detected≈ +4 on the totalKeep SKILL.md to visible, descriptive text. Remove comments and encoded text that address the agent.
- Bidirectional text override characters detected≈ +4 on the totalReplace encoded or assembled strings with plain literals and remove undeclared network calls.
- Python subprocess execution detected≈ +2 on the totalBuild commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
- OS command execution function call detected≈ +2 on the totalBuild commands from fixed arguments; do not interpolate untrusted strings into a shell.