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MCP injection / prompt-poisoning / SSRF scanner. 30+ canonical rules covering the April 2026 Anth...
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MCP injection / prompt-poisoning / SSRF scanner. 30+ canonical rules covering the April 2026 Anth...
Security Report
3.2
Use Caution3.2High RiskThis is a legitimate security-auditing MCP server designed to detect prompt-injection and SSRF patterns in other MCP servers. However, it has several moderate-risk issues: (1) a custom auth middleware loaded from a local filesystem path that falls back to environment-variable checking creates authentication bypass risk, (2) an attestation API URL validation that attempts allowlisting but has implementation gaps, (3) in-memory quota tracking that is trivially bypassed (process restart, parallel invocations), and (4) external API calls for signing reports that could leak sensitive audit data. The server's purpose is legitimate and permissions match its stated function, but the auth and data-handling mechanisms need hardening. Supply chain analysis found 3 known vulnerabilities in dependencies (0 critical, 3 high severity). Package verification found 1 issue.
3 files analyzed · 14 issues found
Security scores are indicators to help you make informed decisions, not guarantees. Always review permissions before connecting any MCP server.
Permissions Required
This plugin requests these system permissions. Most are normal for its category.
How to Install
Add this to your MCP configuration file:
{
"mcpServers": {
"io-github-csoai-org-meok-mcp-injection-scan-mcp": {
"args": [
"meok-mcp-injection-scan-mcp"
],
"command": "uvx"
}
}
}Documentation
View on GitHubFrom the project's GitHub README.
meok-mcp-injection-scan-mcp
Scan any MCP server for the prompt-injection / tool-poisoning / SSRF class disclosed in the April 2026 CVE wave.
pip install meok-mcp-injection-scan-mcp
Why this exists
April 2026 was a bad month for MCP. Anthropic published a "by-design" MCP RCE class affecting ~7,000 public servers (~150M downloads). mcp-server-git shipped a CVE chain. DockerDash got popped by an injection chain. Tool-description prompt injection ("tool poisoning") was demonstrated against every major MCP host.
If you run an MCP server in production, or you're auditing one before adoption, you need a fast scan that flags the patterns the April 2026 disclosures target. This MCP is that scan.
What it checks
30+ canonical rules across 5 severity tiers:
- CRITICAL — direct RCE, system-prompt override, credential exfil patterns, shell metachars in defaults, file:// / internal-network URLs (the DockerDash 169.254.169.254 metadata-pivot vector).
- HIGH — encoded payloads, imperative directives at the agent, supply-chain prompts, env-var references, tool shadowing.
- MEDIUM — urgency / authority language,
additionalProperties=true, unbounded strings, tool-name impersonation. - LOW — over-long descriptions, zero-width / bidi-override chars (the U+202E PoC vector).
Coverage maps to: OWASP LLM Top 10, GenAI Red Team v1, the April 2026 Anthropic MCP RCE disclosure, and the mcp-server-git CVE chain.
Tools exposed
| Tool | Purpose |
|---|---|
scan_mcp_url(url) | Fetch a remote MCP server's tool listing and scan it |
audit_tool_descriptions(tools_json) | Scan a pasted JSON tool list (auth-walled servers) |
signed_safety_report(subject, findings_json, score, note) | Issue a procurement-grade signed cert (Pro tier) |
list_rules() | Inspect the full rule catalogue before subscribing |
pricing() | Subscribe links + tier comparison |
Pricing
| Tier | Price | What you get |
|---|---|---|
| Free | £0 | 5 scans / day, no signed reports |
| Starter | £29/mo | Unlimited scans + signed reports |
| Pro | £79/mo | + scheduled rescans + 48h support |
| Enterprise | £1,499/mo | + custom rule packs + 4h SLA |
Every signed cert lives at https://meok-attestation-api.vercel.app/verify/<cert_id> — auditors and procurement teams confirm without an account.
What you do NOT get
This is a static-pattern scanner. It does not run dynamic taint analysis, fuzz the server with adversarial inputs, or replace a human red-team. It is the first 80% of the audit, in 5 seconds, for free.
Built by MEOK AI Labs
Solo founder. London. 234 MCP packages on PyPI. Live signing infrastructure at meok-attestation-api.vercel.app. Storefront councilof.ai. Get the catalogue: https://meok-attestation-api.vercel.app/catalogue.
Distribution channels
- PyPI:
pip install meok-mcp-injection-scan-mcp(this package) - Apify Store (Pay-Per-Event): https://apify.com/knowing_yucca/meok-mcp-injection-scan
- GitHub (source): https://github.com/CSOAI-ORG/MEOK-LABS/tree/main/mcps/meok-mcp-injection-scan-mcp
- Sponsor: https://github.com/sponsors/CSOAI-ORG · Pro £79/mo →
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