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The publisher performed an authenticated act of publication — proving control of a namespace in the official MCP registry, or appearing in a first-party catalogue an operator curates. That establishes WHO published it. It is not a security finding, and attested artifacts carry Flagged verdicts too.
188 critical findings reported by cisco-skill-scanner, agent-audit-kit, 16 of them in the installed artifact. The composite score alone does not reflect this — read the per-scanner reports below.
This artifact ships from 3 sources and their verdicts differ. The worst is github (Flagged). Installing from a cleaner source does not mean the others are safe — check the source you actually install from. Some sources have no verdict at all; that is not a pass.
github: https://github.com/wende/macbeth, 328 findings
Choose your runtime: the CLI writes the mcpServers config entry for that target.
nerlo install --target claude-code -- macbeth-monorepo
Install respects the composite badge: Clean proceeds, Caution prompts for confirmation, and Flagged is refused. Write operations require an API token.
6 of 11 scanners examined this package. The rest do not apply to it — language, ecosystem and packaging decide which analyzers can say anything, and a scanner that cannot examine an artifact reports nothing rather than passing it.
v1.4.0
2 findings · 2.1s
v2.0.11
69 findings · 63.3s
v0.3.26
179 findings · 37.0s
v0.1.0
0 findings · 64.1s
v0.1.0
0 findings · 64.1s
v0.1.0
0 findings · 28.3s
No report in this scan: capslock, govulncheck, osv-scanner, trivy, trivy_image.
1 scan on record. Every scan's full results are retained immutably for 24 months.
| Completed | Composite | Change | Scanners | Status |
|---|---|---|---|---|
| Aug 2, 2026 | Scan Halted | — | agentshield: completecisco-skill-scanner: completeagent-audit-kit: completenerlo-behavioral: completenerlo-install-instruction: completenerlo-multi-source: complete | rejected |
Findings in files this artifact installs stand as reported; a model re-read the rest and said which ones it believes are false positives. This is a second opinion published beside the evidence, not a correction to it: the per-scanner reports above are unchanged, every dismissed finding is still listed there at its original severity, and the score and the Flagged badge are computed from those raw severities alone. Nothing below moved them.
Out of 250 findings across every scanner that examined this package. 172 of 188 findings rated critical by their scanner were among the dismissals.
Two keys had to turn. The model had to name a reason from a fixed list of six, and a deterministic check of ours — over which files this artifact actually installs — had to independently agree. Anything it could not corroborate is in “not reviewed” above, at full severity.
170 Agent instruction file — The match is in a file that instructs an AI coding agent — a CLAUDE.md or similar. It is documentation of intent, and our own check confirmed it is not part of what gets installed.
Rules: AAK-AGENT-001 · Files: CLAUDE.md · reported by agent-audit-kit
7 Test or fixture file — The match is in a test or fixture. Our own check confirmed the file is not part of what gets installed.
Rules: COMMAND_INJECTION_JS_CHILD_PROCESS, FILE_MAGIC_MISMATCH, AAK-LEGAL-002 · Files: /repo/client/src/__tests__/cli.test.ts, /repo/client/test-electron/fixture/main.js, test/electron-testapp/package.json and 1 more · reported by cisco-skill-scanner, agent-audit-kit
2 CI or editor configuration — The match is in build, CI or editor configuration, confirmed by our own check to be outside the installed artifact.
Rules: AAK-SECRET-004, AAK-GHA-IMMUTABLE-001 · Files: .github/workflows/release.yml, .github/workflows/openhands-pr-review.yml · reported by agent-audit-kit
2 Documentation or example — The match is in documentation or sample code, confirmed by our own check to be outside the installed artifact.
Rules: SOCIAL_ENG_VAGUE_DESCRIPTION, MANIFEST_MISSING_LICENSE · Files: /repo/docs/SKILL.md · reported by cisco-skill-scanner
These findings are in files this artifact installs and are not placeholder values. No false-positive basis can be corroborated for such a finding, so this review never dismisses one; they were not sent to the model and stand at their scanner's severity.
18 MANIFEST_MISSING_LICENSE
Files: /repo/skills/Reminders/SKILL.md, /repo/skills/Safari/SKILL.md, /repo/skills/Notes/SKILL.md and 15 more · reported by cisco-skill-scanner
16 LOW_ANALYZABILITY
Files: /repo/skills/SystemSettings, /repo/skills/Mail, /repo/skills/Maps and 13 more · reported by cisco-skill-scanner
14 COMMAND_INJECTION_JS_CHILD_PROCESS
Files: /repo/client/bin/macbeth.mjs, /repo/client/src/applescript.ts, /repo/client/src/mcp.ts and 2 more · reported by cisco-skill-scanner
6 YARA_prompt_injection_unicode_steganography
Files: /repo/assets/macbeth-simulated-walkthrough.gif · reported by cisco-skill-scanner
5 SOCIAL_ENG_VAGUE_DESCRIPTION
Files: /repo/SKILL.md, /repo/skills/SKILL.md, /repo/client/SKILL.md and 2 more · reported by cisco-skill-scanner
2
Critical risks: shell execution and data tainting.
The artifact contains critical findings related to shell execution and data tainting. Multiple instances of command injection are present in client-side code, specifically within `macbeth.mjs`, `applescript.ts`, `mcp.ts`, `native-bridge.ts`, and `shell.ts`. Additionally, data tainting issues are identified in `client/src/mcp.ts`, which could lead to further vulnerabilities.
Concern level assessed by the review: Critical. This is the review's scale, not the registry badge.
Reviewed by gemini-2.5-flash. The model sees the findings, not your code, and cannot change a score.
Files: package.json, webpage/package.json · reported by agent-audit-kit
2 AAK-TAINT-001
Files: client/src/mcp.ts · reported by agent-audit-kit
1 AAK-MCP-018
Files: client/src/mcp.ts · reported by agent-audit-kit
1 EXCESSIVE_FILE_COUNT
Files: /repo/. · reported by cisco-skill-scanner
1 HIDDEN_DATA_FILE
Files: /repo/.agents/skills/macbeth-code-review.md · reported by cisco-skill-scanner
1 OVERSIZED_FILE
Files: /repo/assets/macbeth-simulated-walkthrough.gif · reported by cisco-skill-scanner
1 skills-missing-governance-skills/DEVELOPING_MACBETH.md
Files: skills/DEVELOPING_MACBETH.md · reported by agentshield
1 skills-missing-telemetry-skills/DEVELOPING_MACBETH.md
Files: skills/DEVELOPING_MACBETH.md · reported by agentshield