nyuwaymcpsandbox@1.0.2
VERIFIED· not startedPublisher claims: "Open-source behavioral sandbox for Model Context Protocol (MCP) servers" Observed in sandbox: no network, touches nothing outside the project, writes no memory.
Registry PyPI (MCP server)Publisher nyuway-cybersecurity · publishing for 176 daysInstalls 0Last detonated 26 h ago
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: Verified 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 nyuway-sandbox-probe.invalid, githubusercontent.com, nyuway.ai, nodejs.org — 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.
$vet-skills run --net declared -- uvx nyuwaymcpsandbox
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 2026-11-13 and scored it 81/100 (Verified). In what ran, nothing we could detect went wrong: no undeclared network egress, no credential reads, no persistent instruction writes. What it does with a real credential was not observed; the static findings and the publisher carry the rest of the score. Summary: no network, touches nothing outside the project, writes no memory.
Behavior trace
Honeypot run · 0 s · 2 scenarios · 0 deviationst+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
0.2sprocessscript backend runs setup only
0.2sprocessno install scripts to re-run
Static findings
HIGH
Access to sensitive file pathsnyuwaymcpsandbox/cli/main.py:57 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system files
AST05"""Parse a minimal KEY=VALUE .env file.Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.MEDIUM
Access to sensitive file pathstests/test_malicious_fixture.py:205 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system files
AST05a targeted call to 'read_file' with '/etc/passwd' as the path argument,Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.MEDIUM
Access to sensitive file pathstests/test_malicious_fixture.py:16 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system files
AST05'/etc/passwd' as the path argument. Asserts the sensitive_file_readFix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.MEDIUM
File permission modification commandnyuwaymcpsandbox/pipeline.py:391 · File permission modification command — agent changes file ownership/permissions
AST05f" && chmod +x /tmp/chrome-wrapper && sleep infinity"Fix: Request the narrowest permission that works; replace wildcards with the exact paths or hosts.MEDIUM
Access to sensitive file pathstests/test_malicious_fixture.py:127 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system files
AST05{"name": "read_file", "arguments": {"path": "/etc/passwd"}},Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.MEDIUM
Process kill commandnyuwaymcpsandbox/drivers/subprocess_stream.py:81 · Process kill command — agent can terminate processes
AST05# Step 3: terminate, then escalate to kill if still alive.Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.MEDIUM
Access to sensitive file pathstests/test_sources.py:240 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system files
AST05archive.write_bytes(_build_zip_bytes({"../../etc/passwd": b"x"}))Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.MEDIUM
Access to sensitive file pathstests/test_malicious_fixture.py:210 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system files
AST05"""LLM that always calls read_file with /etc/passwd."""Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.HIGH
Access to sensitive file pathsnyuwaymcpsandbox/drivers/llm_driver.py:44 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system files
AST05# prompts like "read /etc/passwd" before any tool call fires, producingFix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.MEDIUM
Access to sensitive file pathstests/test_sources.py:233 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system files
AST05archive.write_bytes(_build_zip_bytes({"/etc/passwd": b"x"}))Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.MEDIUM
Python subprocess execution detectednyuwaymcpsandbox/pipeline.py:86 · Python subprocess execution detected
AST05result = subprocess.run(Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.MEDIUM
Access to sensitive file pathstests/test_cli_smoke.py:348 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system files
AST05"""The .env parser handles the common shapes: KEY=value, quotes, comments."""Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.MEDIUM
Access to sensitive file pathstests/test_malicious_fixture.py:220 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system files
AST05arguments={"path": "/etc/passwd"},Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.MEDIUM
Access to sensitive file pathstests/test_sources.py:199 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system files
AST05info.linkname = "/etc/passwd"Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.HIGH
Access to sensitive file pathsnyuwaymcpsandbox/cli/main.py:171 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system files
AST05help="Path to a KEY=VALUE .env file whose entries are injected into the MCP "Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.MEDIUM
Python subprocess execution detectednyuwaymcpsandbox/drivers/subprocess_stream.py:38 · Python subprocess execution detected
AST05self._proc = subprocess.Popen(Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.Cost to the agent
Instructions loaded
≈56 tok
1 file · 81 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 nyuwaymcpsandbox@1.0.2 as of 25 h ago. This is the package itself, not its dependencies.