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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.
4 critical findings reported by cisco-skill-scanner, agent-audit-kit. The composite score alone does not reflect this — read the per-scanner reports below.
Choose your runtime: the CLI writes the mcpServers config entry for that target.
nerlo install --target claude-code -- reletter-mcp
Install respects the composite badge: Clean proceeds, Caution prompts for confirmation, and Flagged is refused. Write operations require an API token.
5 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
0 findings · 0.5s
v2.0.11
15 findings · 6.6s
v0.3.26
9 findings · 1.6s
v0.1.0
4 findings · 27.8s
v0.1.0
0 findings · 27.8s
v0.1.0
This scanner found nothing in this artifact that it assesses. What each scanner covers
0 findings · 11.9s
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 5, 2026 | Scan Halted | — | agentshield: completecisco-skill-scanner: completeagent-audit-kit: completenerlo-behavioral: completenerlo-install-instruction: completenerlo-multi-source ·n/a: not applicable | 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 28 findings across every scanner that examined this package. None of the 4 findings rated critical by their scanner were dismissed.
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.
9 DATA_EXFIL_JS_NETWORK
Files: /repo/src/api-key-handler.ts, /repo/src/index.ts, /repo/src/stdio.ts and 1 more · reported by cisco-skill-scanner
3 AAK-MCP-018
Files: src/tools.ts, src/stdio.ts, src/index.ts · reported by agent-audit-kit
3 opt.nerlo-rules.nerlo-js-secret-to-network-egress
Files: /repo/src/api-key-handler.ts, /repo/src/index.ts, /repo/src/stdio.ts · reported by nerlo-behavioral
2 COMMAND_INJECTION_EVAL
Files: /repo/worker-configuration.d.ts · reported by cisco-skill-scanner
1 AAK-ANTHROPIC-SDK-001
Files: src/stdio.ts · reported by agent-audit-kit
1 AAK-MCP-001
Files: .mcp.json · reported by agent-audit-kit
1 AAK-MCP-MARKETPLACE-CONFIG-FETCH-001
Files: src/stdio.ts · reported by agent-audit-kit
1 AAK-OAUTH-3P-001
Files: package.json · reported by agent-audit-kit
1 AAK-SEC-MD-001
Files: SECURITY.md · reported by agent-audit-kit
1 AAK-SUPPLY-005
Files: package-lock.json · reported by agent-audit-kit
1 HIDDEN_DATA_FILE
Files: /repo/.cursor-plugin/plugin.json · reported by cisco-skill-scanner
1 LOW_ANALYZABILITY
Files: /repo · reported by cisco-skill-scanner
1 MANIFEST_MISSING_LICENSE
Files: /repo/SKILL.md · reported by cisco-skill-scanner
1 opt.nerlo-rules.nerlo-hardcoded-external-egress
Files: /repo/src/api-key-handler.ts · reported by nerlo-behavioral
1 SOCIAL_ENG_VAGUE_DESCRIPTION
Files: /repo/SKILL.md · reported by cisco-skill-scanner
Artifact has critical command injection and credential egress risks.
The artifact contains critical command injection vulnerabilities in `worker-configuration.d.ts`, allowing for shell execution. It also exhibits high-severity credential access and network egress in `api-key-handler.ts`, `index.ts`, and `stdio.ts`, potentially exposing sensitive information. Critical marketplace configuration fetching is noted in `stdio.ts` and `.mcp.json`, which could involve sensitive data. Additionally, the artifact uses a third-party OAuth mechanism, indicating credential handling.
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.