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Static security scanner for MCP (Model Context Protocol) servers — catches tool poisoning, prompt injection, leaked credentials, and over-broad permissions before an agent is wired to them.
We found this by crawling public sources and nobody has attested to it. That is how most of the registry gets here, and it is not a mark against the artifact — it only means no authenticated act of publication is on record. An artifact can be the vendor's own and still appear here.
102 critical findings reported by cisco-skill-scanner, agent-audit-kit, 66 of them in the installed artifact. 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 -- warden-mcp
Install respects the composite badge: Clean proceeds, Caution prompts for confirmation, and Flagged is refused. Write operations require an API token.
4 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.
v2.0.11
883 findings · 47.5s
v0.3.74
233 findings · 33.8s
v0.1.0
25 findings · 19.3s
v0.1.0
1 finding · 19.3s
v1.4.0
None of the entry points this scanner reads were found in this artifact. What each scanner covers
0 findings · 0.2s
vv0.3.2
No Go packages were found in this artifact. What each scanner covers
0 findings · 0.1s
v0.1.0
This scanner found nothing in this artifact that it assesses. What each scanner covers
0 findings · 2.0s
No report in this scan: govulncheck, osv-scanner, trivy, trivy_image.
2 scans on record. Every scan's full results are retained immutably for 24 months.
| Completed | Composite | Change | Scanners | Status |
|---|---|---|---|---|
| Sep 3, 2026 | Scan Halted | — | agentshield ·n/a: not applicablecisco-skill-scanner: completeagent-audit-kit: completenerlo-behavioral: completenerlo-install-instruction: completecapslock ·n/a: not applicablenerlo-multi-source ·n/a: not applicable | rejected |
| Aug 4, 2026 | Scan Halted | — | agentshield ·n/a: not applicablecisco-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 1,142 findings across every scanner that examined this package. 34 of 102 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.
338 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_EVAL, COMMAND_INJECTION_JS_CHILD_PROCESS, AAK-SECRET-002 and 12 more · Files: /repo/benchmark/servers/supabase-community__supabase-mcp/files/packages/mcp-server-supabase/test/mocks.ts, /repo/benchmark/servers/modelcontextprotocol__servers/files/src/filesystem/__tests__/startup-validation.test.ts, /repo/benchmark/servers/modelcontextprotocol__servers/files/src/filesystem/__tests__/structured-content.test.ts and 31 more · reported by cisco-skill-scanner, agent-audit-kit
59 Documentation or example — The match is in documentation or sample code, confirmed by our own check to be outside the installed artifact.
Rules: YARA_prompt_injection_generic, AAK-SECRET-008, opt.nerlo-rules.nerlo-py-dynamic-exec and 11 more · Files: /repo/docs/rules.md, examples/vulnerable-demo/.mcp.json, /repo/examples/vulnerable-demo/server.py and 22 more · reported by cisco-skill-scanner, agent-audit-kit, nerlo-behavioral
9 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-003, TOOL_ABUSE_UNDECLARED_NETWORK, FILE_MAGIC_MISMATCH and 1 more · Files: .github/copilot-instructions.md, /repo/repo/AGENTS.md, /repo/benchmark/servers/sooperset__mcp-atlassian/files/repo/benchmark/servers/sooperset__mcp-atlassian/files/AGENTS.md and 3 more · reported by agent-audit-kit, cisco-skill-scanner
7 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-MARKETPLACE-001, MANIFEST_INVALID_NAME · Files: benchmark/servers/upstash__context7/files/.github/plugin/marketplace.json, /repo/.github/SKILL.md, /repo/benchmark/servers/sooperset__mcp-atlassian/files/.github/SKILL.md and 4 more · reported by agent-audit-kit, 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.
180 DATA_EXFIL_JS_NETWORK
Files: /repo/benchmark/servers/GLips__Figma-Context-MCP/files/src/utils/common.ts, /repo/benchmark/servers/GLips__Figma-Context-MCP/files/src/utils/fetch-json.ts, /repo/benchmark/servers/mendableai__firecrawl-mcp-server/files/src/index.ts and 20 more · reported by cisco-skill-scanner
61 MANIFEST_MISSING_LICENSE
Files: /repo/benchmark/servers/upstash__context7/files/plugins/codex/context7/skills/context7-mcp/SKILL.md, /repo/benchmark/servers/upstash__context7/files/plugins/cursor/context7/skills/context7-mcp/SKILL.md, /repo/benchmark/servers/upstash__context7/files/plugins/copilot/context7/skills/context7-mcp/SKILL.md and 58 more · reported by cisco-skill-scanner
47 SOCIAL_ENG_VAGUE_DESCRIPTION
Files: /repo/SKILL.md, /repo/action/SKILL.md, /repo/benchmark/servers/supabase-community__supabase-mcp/SKILL.md and 44 more · reported by cisco-skill-scanner
46 AAK-MCP-018
Files: benchmark/servers/upstash__context7/files/packages/mcp/src/index.ts, benchmark/servers/upstash__context7/files/packages/mcp/src/lib/auth/auth-prompt.ts, benchmark/servers/sooperset__mcp-atlassian/files/src/mcp_atlassian/__init__.py and 43 more · reported by agent-audit-kit
The model could have called any of these a false positive and did not.
3 AAK-MCP-007
Files: examples/vulnerable-demo/.mcp.json · reported by agent-audit-kit
3 COMMAND_INJECTION_SHELL_TRUE
Files: /repo/examples/vulnerable-demo/server.py, /repo/tests/test_rules_fixtures.py · reported by cisco-skill-scanner
Artifact has critical command injection and network egress capabilities.
The artifact exhibits critical command injection vulnerabilities, including via JavaScript child processes, `eval` calls, and standard I/O within Model Context Protocol components. It also has critical Server-Side Request Forgery (SSRF) and DNS rebinding findings, indicating potential for network egress to arbitrary destinations. High severity findings further indicate potential for secret exposure during network egress and additional command injection via shell execution.
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: /repo/benchmark/servers/upstash__context7/files/eslint.config.js, /repo/benchmark/servers/upstash__context7/files/packages/cli/eslint.config.js, /repo/benchmark/servers/upstash__context7/files/packages/mcp/eslint.config.js and 8 more · reported by cisco-skill-scanner
39 DATA_EXFIL_JS_FS_ACCESS
Files: /repo/benchmark/servers/modelcontextprotocol__servers/files/src/filesystem/lib.ts, /repo/benchmark/servers/modelcontextprotocol__servers/files/src/memory/index.ts, /repo/benchmark/servers/GLips__Figma-Context-MCP/files/src/utils/logger.ts and 1 more · reported by cisco-skill-scanner
37 HIDDEN_DATA_FILE
Files: /repo/.pre-commit-config.yaml, /repo/benchmark/servers/sooperset__mcp-atlassian/files/.pre-commit-config.yaml, /repo/benchmark/servers/supabase-community__supabase-mcp/files/.release-please-manifest.json and 15 more · reported by cisco-skill-scanner
30 AAK-LOGINJ-001
Files: benchmark/servers/sooperset__mcp-atlassian/files/src/mcp_atlassian/servers/jira.py, benchmark/servers/sooperset__mcp-atlassian/files/src/mcp_atlassian/servers/confluence.py · reported by agent-audit-kit
28 LOW_ANALYZABILITY
Files: /repo/benchmark/servers/upstash__context7/files/packages/sdk, /repo/benchmark/servers/modelcontextprotocol__servers/files/src/sequentialthinking, /repo/benchmark/servers/supabase-community__supabase-mcp/files/packages/mcp-server-postgrest and 25 more · reported by cisco-skill-scanner
19 opt.nerlo-rules.nerlo-js-secret-to-network-egress
Files: /repo/benchmark/servers/mendableai__firecrawl-mcp-server/files/src/index.ts, /repo/benchmark/servers/mendableai__firecrawl-mcp-server/files/src/monitor.ts, /repo/benchmark/servers/upstash__context7/files/packages/cli/src/commands/auth.ts and 3 more · reported by nerlo-behavioral
18 COMMAND_INJECTION_JS_CHILD_PROCESS
Files: /repo/benchmark/servers/upstash__context7/files/packages/cli/src/utils/github.ts, /repo/benchmark/servers/zcaceres__fetch-mcp/files/src/Fetcher.ts, /repo/benchmark/servers/upstash__context7/files/packages/cli/src/commands/generate.ts and 1 more · reported by cisco-skill-scanner
17 DATA_EXFIL_NETWORK_REQUESTS
Files: /repo/benchmark/servers/sooperset__mcp-atlassian/files/src/mcp_atlassian/jira/users.py, /repo/benchmark/servers/sooperset__mcp-atlassian/files/src/mcp_atlassian/utils/oauth.py, /repo/src/mcpverity/github_fetch.py and 1 more · reported by cisco-skill-scanner
12 COMMAND_INJECTION_EVAL
Files: /repo/benchmark/servers/upstash__context7/files/packages/sdk/src/commands/command.ts, /repo/benchmark/servers/upstash__context7/files/packages/sdk/src/commands/get-context/index.ts, /repo/benchmark/servers/upstash__context7/files/packages/sdk/src/commands/search-library/index.ts · reported by cisco-skill-scanner
12 YARA_coercive_injection_generic
Files: /repo/benchmark/servers/upstash__context7/files/packages/mcp/src/index.ts, /repo/benchmark/servers/upstash__context7/files/packages/pi/lib/prompts.ts, /repo/benchmark/servers/upstash__context7/files/packages/tools-ai-sdk/src/prompts/system.ts · reported by cisco-skill-scanner
10 AAK-SSRF-001
Files: benchmark/servers/upstash__context7/files/packages/mcp/src/index.ts, benchmark/servers/sooperset__mcp-atlassian/files/src/mcp_atlassian/servers/jira.py, benchmark/servers/mendableai__firecrawl-mcp-server/files/src/index.ts and 7 more · reported by agent-audit-kit
10 AAK-SSRF-005
Files: benchmark/servers/upstash__context7/files/packages/mcp/src/index.ts, benchmark/servers/sooperset__mcp-atlassian/files/src/mcp_atlassian/servers/jira.py, benchmark/servers/mendableai__firecrawl-mcp-server/files/src/index.ts and 7 more · reported by agent-audit-kit
10 EXCESSIVE_FILE_COUNT
Files: /repo/benchmark/servers/upstash__context7/files/., /repo/benchmark/servers/sooperset__mcp-atlassian/files/., /repo/benchmark/servers/upstash__context7/. and 7 more · reported by cisco-skill-scanner
9 AAK-SECRET-004
Files: benchmark/servers/upstash__context7/files/packages/pi/lib/api.ts, benchmark/servers/upstash__context7/files/packages/cli/src/utils/auth.ts, benchmark/servers/sooperset__mcp-atlassian/files/src/mcp_atlassian/utils/oauth.py and 5 more · reported by agent-audit-kit
9 MANIFEST_INVALID_NAME
Files: /repo/benchmark/servers/upstash__context7/SKILL.md, /repo/benchmark/servers/mendableai__firecrawl-mcp-server/SKILL.md, /repo/benchmark/servers/upstash__context7/files/.changeset/SKILL.md and 6 more · reported by cisco-skill-scanner
9 RESOURCE_ABUSE_INFINITE_LOOP
Files: /repo/benchmark/servers/sooperset__mcp-atlassian/files/src/mcp_atlassian/jira/field_options.py, /repo/benchmark/servers/sooperset__mcp-atlassian/files/src/mcp_atlassian/jira/queues.py, /repo/benchmark/servers/sooperset__mcp-atlassian/files/src/mcp_atlassian/jira/worklog.py · reported by cisco-skill-scanner
5 AAK-MCP-001
Files: benchmark/servers/upstash__context7/files/plugins/context7-power/mcp.json, benchmark/servers/upstash__context7/files/plugins/codex/context7/.mcp.json, benchmark/servers/upstash__context7/files/plugins/copilot/context7/.mcp.json and 2 more · reported by agent-audit-kit
5 AAK-MCP-ATTEST-001
Files: benchmark/servers/upstash__context7/files/plugins/context7-power/mcp.json, benchmark/servers/upstash__context7/files/plugins/codex/context7/.mcp.json, benchmark/servers/upstash__context7/files/plugins/copilot/context7/.mcp.json and 2 more · reported by agent-audit-kit
5 AAK-MCP-STATELESS-001
Files: benchmark/servers/upstash__context7/files/packages/mcp/src/index.ts, benchmark/servers/upstash__context7/files/packages/mcp/src/lib/encryption.ts, benchmark/servers/sooperset__mcp-atlassian/files/src/mcp_atlassian/servers/main.py and 2 more · reported by agent-audit-kit
5 AAK-MCP-STDIO-CMD-INJ-002
Files: benchmark/servers/supabase-community__supabase-mcp/files/packages/mcp-server-supabase/src/transports/stdio.ts, benchmark/servers/upstash__context7/files/packages/mcp/src/index.ts, benchmark/servers/zcaceres__fetch-mcp/files/src/index.ts and 2 more · reported by agent-audit-kit
5 AAK-OAUTH-005
Files: benchmark/servers/upstash__context7/files/packages/mcp/src/index.ts, benchmark/servers/sooperset__mcp-atlassian/files/src/mcp_atlassian/jira/forms_api.py, benchmark/servers/sooperset__mcp-atlassian/files/src/mcp_atlassian/servers/main.py and 2 more · reported by agent-audit-kit
5 AAK-SPLUNK-TOKLOG-001
Files: benchmark/servers/sooperset__mcp-atlassian/files/src/mcp_atlassian/utils/oauth.py, benchmark/servers/sooperset__mcp-atlassian/files/src/mcp_atlassian/servers/dependencies.py, benchmark/servers/sooperset__mcp-atlassian/files/src/mcp_atlassian/servers/main.py and 2 more · reported by agent-audit-kit
5 opt.nerlo-rules.nerlo-py-secret-to-network-egress
Files: /repo/benchmark/servers/sooperset__mcp-atlassian/files/src/mcp_atlassian/jira/forms_api.py, /repo/benchmark/servers/sooperset__mcp-atlassian/files/src/mcp_atlassian/jira/users.py, /repo/benchmark/servers/sooperset__mcp-atlassian/files/src/mcp_atlassian/utils/oauth.py · reported by nerlo-behavioral
4 AAK-DNS-REBIND-001
Files: benchmark/servers/upstash__context7/files/packages/mcp/src/index.ts, benchmark/servers/modelcontextprotocol__servers/files/src/everything/index.ts, benchmark/servers/modelcontextprotocol__servers/files/src/everything/transports/streamableHttp.ts and 1 more · reported by agent-audit-kit
4 AAK-MCP-SSRF-001
Files: benchmark/servers/supabase-community__supabase-mcp/files/packages/mcp-server-postgrest/src/server.ts, benchmark/servers/mendableai__firecrawl-mcp-server/files/src/index.ts, benchmark/servers/modelcontextprotocol__servers/files/src/everything/tools/gzip-file-as-resource.ts and 1 more · reported by agent-audit-kit
3 AAK-MCP-DEPRECATED-001
Files: benchmark/servers/modelcontextprotocol__servers/files/src/filesystem/index.ts, benchmark/servers/modelcontextprotocol__servers/files/src/git/src/mcp_server_git/server.py, benchmark/servers/modelcontextprotocol__servers/files/src/everything/server/roots.ts · reported by agent-audit-kit
3 AAK-MCP-HTTP-NOAUTH-SERVER-001
Files: benchmark/servers/upstash__context7/files/packages/mcp/src/index.ts, benchmark/servers/modelcontextprotocol__servers/files/src/everything/transports/streamableHttp.ts, benchmark/servers/modelcontextprotocol__servers/files/src/everything/transports/sse.ts · reported by agent-audit-kit
3 AAK-OAUTH-006
Files: benchmark/servers/sooperset__mcp-atlassian/files/scripts/oauth_authorize.py, benchmark/servers/sooperset__mcp-atlassian/files/src/mcp_atlassian/utils/oauth.py, benchmark/servers/sooperset__mcp-atlassian/files/src/mcp_atlassian/utils/oauth_setup.py · reported by agent-audit-kit
3 DATA_EXFIL_SENSITIVE_FILES
Files: /repo/benchmark/servers/sooperset__mcp-atlassian/files/src/mcp_atlassian/utils/oauth.py · reported by cisco-skill-scanner
2 AAK-LEGAL-002
Files: benchmark/servers/supabase-community__supabase-mcp/files/package.json, benchmark/servers/github__github-mcp-server/files/ui/package.json · reported by agent-audit-kit
2 AAK-MARKETPLACE-001
Files: benchmark/servers/upstash__context7/files/.claude-plugin/marketplace.json, benchmark/servers/upstash__context7/files/.agents/plugins/marketplace.json · reported by agent-audit-kit
2 AAK-MCP-DEPRECATED-002
Files: benchmark/servers/modelcontextprotocol__servers/files/src/everything/tools/trigger-sampling-request.ts, benchmark/servers/modelcontextprotocol__servers/files/src/everything/tools/trigger-sampling-request-async.ts · reported by agent-audit-kit
2 AAK-OAUTH-007
Files: benchmark/servers/upstash__context7/files/packages/cli/src/utils/auth.ts, benchmark/servers/sooperset__mcp-atlassian/files/src/mcp_atlassian/utils/oauth.py · reported by agent-audit-kit
2 AAK-SKILL-001
Files: benchmark/servers/upstash__context7/files/skills/context7-cli/SKILL.md, benchmark/servers/upstash__context7/files/skills/find-docs/SKILL.md · reported by agent-audit-kit
2 AAK-SSRF-002
Files: benchmark/servers/upstash__context7/files/packages/mcp/src/index.ts, benchmark/servers/mendableai__firecrawl-mcp-server/files/src/index.ts · reported by agent-audit-kit
1 AAK-LANGCHAIN-SSRF-REDIR-001
Files: benchmark/servers/zcaceres__fetch-mcp/files/src/Fetcher.ts · reported by agent-audit-kit
1 AAK-MCP-DEPRECATED-003
Files: benchmark/servers/modelcontextprotocol__servers/files/src/everything/server/logging.ts · reported by agent-audit-kit
1 AAK-OAUTH-001
Files: benchmark/servers/sooperset__mcp-atlassian/files/src/mcp_atlassian/servers/main.py · reported by agent-audit-kit
1 AAK-OAUTH-004
Files: benchmark/servers/sooperset__mcp-atlassian/files/src/mcp_atlassian/utils/oauth.py · reported by agent-audit-kit
1 AAK-OAUTH-008
Files: benchmark/servers/mendableai__firecrawl-mcp-server/files/src/monitor.ts · reported by agent-audit-kit
1 AAK-SUPPLY-004
Files: pyproject.toml · reported by agent-audit-kit
1 AAK-TAINT-003
Files: benchmark/servers/modelcontextprotocol__servers/files/src/memory/index.ts · reported by agent-audit-kit
1 AAK-TASKS-003
Files: benchmark/servers/modelcontextprotocol__servers/files/src/everything/server/index.ts · reported by agent-audit-kit
1 opt.nerlo-rules.nerlo-install-run-bundled-artifact
Files: /repo/benchmark/servers/modelcontextprotocol__servers/files/ADDITIONAL.md · reported by nerlo-install-instruction
1 TOOL_ABUSE_UNDECLARED_NETWORK
Files: /repo/benchmark/servers/sooperset__mcp-atlassian/repo/benchmark/servers/sooperset__mcp-atlassian/NOTICE.md · reported by cisco-skill-scanner
Showing 25 of 144; the rest are in the per-scanner reports above.