42Crunch for Buffalo

middleBrick is a self-service API security scanner that operates against any public URL, including Buffalo applications. You submit an endpoint, and within under a minute you receive a risk score from A to F with prioritized findings. The scanner uses only read-only methods such as GET and HEAD, plus text-only POST for LLM probes, so it does not modify application state.

For Buffalo apps, this approach tests the public surface as a consumer would see it, without requiring code access, agents, or SDKs. Because Buffalo applications often expose REST or GraphQL endpoints behind standard routing, the scanner validates how these routes respond to unexpected inputs and authorization contexts. The process aligns with OWASP API Top 10 (2023) and maps findings to related security control validation.

Buffalo applications frequently use built-in security middleware and default configurations, which middleBrick evaluates as part of its 12 detection categories. The scanner checks authentication mechanisms, including how Buffalo sessions and tokens are handled, and looks for JWT misconfigurations such as alg=none or missing claims. It also assesses security headers and WWW-Authenticate compliance, which are important when using Buffalo’s default header injection patterns.

Additional checks include BOLA and BFLA through IDOR and admin endpoint probing, input validation against CORS wildcard usage and dangerous HTTP methods, and data exposure via PII or API key leakage. For applications using encrypted cookies or session storage, the scanner validates encryption settings, including HSTS and cookie flags, and supports authenticated scans when you provide carefully whitelisted headers.

If your Buffalo application exposes an OpenAPI definition, middleBrick parses OpenAPI 3.0, 3.1, and Swagger 2.0 documents with recursive $ref resolution. It cross-references the spec against runtime behavior to surface undefined security schemes, sensitive fields in responses, deprecated operations, and missing pagination indicators.

This comparison helps you identify mismatches between documented behavior and actual endpoints, which is especially useful when Buffalo generators or scaffolding create routes that do not explicitly declare security requirements. The analysis supports audit evidence collection and helps you prepare for reviews involving API design quality and control coverage.

Authenticated scans are available starting with the Starter tier and require domain verification via DNS TXT record or an HTTP well-known file to ensure only the domain owner can submit credentials. When you provide Bearer tokens, API keys, Basic auth, or cookies, the scanner forwards only the allowed headers, including Authorization, X-API-Key, Cookie, and X-Custom-*.

This approach reduces noise and ensures that your Buffalo application is tested in a realistic authenticated context, such as when role-based access controls or middleware-based permissions are in use. The scanner does not attempt to fix or patch findings; it reports results with remediation guidance to help your team investigate further.

middleBrick includes LLM security testing via 18 adversarial probes across three scan tiers, covering system prompt extraction, instruction override, jailbreak techniques, data exfiltration attempts, and token smuggling. These checks are useful for assessing how Buffalo-hosted APIs behave when exposed to prompt manipulation or model abuse scenarios.

For ongoing risk management, the Pro tier provides scheduled rescans, diff detection to track new or resolved findings, email alerts, HMAC-SHA256 signed webhooks, and support for integrations such as GitHub Actions and MCP servers. This helps you align with security controls described in frameworks like SOC 2 Type II and PCI-DSS 4.0 while maintaining visibility over API risk trends.