Skills/PyPI/mcp-sentinel

mcp-sentinel@0.1.0

CAUTION· not started

Publisher claims: "Automated testing framework for MCP (Model Context Protocol) servers" Observed in sandbox: no network, touches nothing outside the project, writes no memory.

Registry PyPI (MCP server)Publisher dev07-harsh · publishing for 275 daysInstalls 13Last detonated 5d 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

It will ask for
no credential variables read in the code
Where it talks to
no vendor host named in the code
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.

$vet-skills run --net declared -- uvx mcp-sentinel

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 68/100 (Caution). It is not known to be malicious, but it has behaviour or code a security policy should decide on before install. Notable findings: URL to the cloud instance metadata address; URL to the cloud instance metadata address; document.cookie access. 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 ·
0.1sclaimednot started: dependency install failed (exit 1); the server itself was not observed
0.1sprocessscript backend runs setup only
0.2sprocessno install scripts to re-run

Static findings

CRITICAL
URL to the cloud instance metadata addresssrc/mcpsentinel/generation/payloads.py:48 · URL to the cloud instance metadata address — reads the VM's credentialsInjectionPayload("http://169.254.169.254/latest/meta-data/", "ssrf_aws_metadata", "ssrf"),Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST07
CRITICAL
URL to the cloud instance metadata addresssrc/mcpsentinel/generation/strategies.py:98 · URL to the cloud instance metadata address — reads the VM's credentials("http://169.254.169.254/", "ssrf_metadata", "semantic_url"),Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST07
HIGH
document.cookie accesssrc/mcpsentinel/generation/payloads.py:42 · document.cookie access — can steal session cookiesInjectionPayload("javascript:alert(document.cookie)", "xss_js_protocol", "xss"),Fix: Replace encoded or assembled strings with plain literals and remove undeclared network calls.
AST07
HIGH
Access to sensitive file pathssrc/mcpsentinel/generation/strategies.py:113 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system files("../../../etc/shadow", "path_traversal_shadow", "semantic_path"),Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
HIGH
Access to sensitive file pathssrc/mcpsentinel/generation/payloads.py:29 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system filesInjectionPayload("$(cat /etc/passwd)", "cmd_subshell", "command_injection"),Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
MEDIUM
npx invocation of non-well-known packagetests/unit/test_cli_dispatch.py:26 · npx invocation of non-well-known package — may execute untrusted codeassert _is_default_invocation(["npx my-mcp-server"]) is TrueFix: Pin versions and sources; vendor anything fetched at install time.
AST06
HIGH
Access to sensitive file pathssrc/mcpsentinel/generation/payloads.py:35 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system filesInjectionPayload("....//....//....//etc/passwd", "path_traversal_double", "path_traversal"),Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
HIGH
Access to sensitive file pathssrc/mcpsentinel/generation/payloads.py:32 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system filesInjectionPayload("${IFS}cat${IFS}/etc/passwd", "cmd_ifs_bypass", "command_injection"),Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
HIGH
Access to sensitive file pathssrc/mcpsentinel/generation/payloads.py:34 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system filesInjectionPayload("../../../etc/passwd", "path_traversal_etc", "path_traversal"),Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
MEDIUM
Dense URL-encoded contentsrc/mcpsentinel/generation/payloads.py:37 · Dense URL-encoded content — may be obfuscating payloads"%2e%2e%2f%2e%2e%2f%2e%2e%2fetc%2fpasswd", "path_traversal_encoded", "path_traversal"Fix: Put hosts, commands and strings in plain source. Decoding at runtime looks identical to malware and costs points on its own.
AST07
HIGH
Access to sensitive file pathssrc/mcpsentinel/generation/payloads.py:50 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system filesInjectionPayload("file:///etc/passwd", "ssrf_file_proto", "ssrf"),Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
HIGH
Access to sensitive file pathssrc/mcpsentinel/generation/strategies.py:116 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system files("file:///etc/passwd", "path_file_proto", "semantic_path"),Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05

Cost to the agent

Instructions loaded
≈53 tok
1 file · 71 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-sentinel@0.1.0 as of 5d ago. This is the package itself, not its dependencies.

What would make this Verified

12 points to 80 · weights: behavior 45%, static 25%, prompt 15%, publisher 15%
  1. URL to the cloud instance metadata address≈ +9 on the totalStop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
  2. Unclaimed publisher≈ +8 on the totalClaim dev07-harsh: a verified publisher gets +50 on publisher trust. It is free and usually instant with GitHub sign-in.
  3. document.cookie access≈ +4 on the totalReplace encoded or assembled strings with plain literals and remove undeclared network calls.
  4. Access to sensitive file paths≈ +4 on the totalStop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
  5. npx invocation of non-well-known package≈ +2 on the totalPin versions and sources; vendor anything fetched at install time.
  6. Dense URL-encoded content≈ +2 on the totalPut hosts, commands and strings in plain source. Decoding at runtime looks identical to malware and costs points on its own.
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