API Gateway Default Endpoint Enabled With Custom Domain

What this rule checks

Detects REST APIs that leave the default execute-api endpoint enabled while a custom domain is configured, letting clients bypass the domain and its edge controls.

How to fix it

1. 1Set DisableExecuteApiEndpoint to true on the REST API
2. 2Route all traffic through the custom domain and its WAF / edge controls

import * as apigateway from 'aws-cdk-lib/aws-apigateway';

// The custom domain is mapped to this API, but the default execute-api
// endpoint stays enabled — clients can bypass the domain (and its WAF).
const domain = new apigateway.CfnDomainName(this, 'Domain', {
  domainName: 'api.example.com',
  regionalCertificateArn:
    'arn:aws:acm:us-east-1:111122223333:certificate/abcd',
  endpointConfiguration: { types: ['REGIONAL'] },
});
const api = new apigateway.CfnRestApi(this, 'Api', { name: 'my-api' });
new apigateway.CfnBasePathMapping(this, 'Mapping', {
  domainName: domain.ref,
  restApiId: api.ref,
});

import * as apigateway from 'aws-cdk-lib/aws-apigateway';

const domain = new apigateway.CfnDomainName(this, 'Domain', {
  domainName: 'api.example.com',
  regionalCertificateArn:
    'arn:aws:acm:us-east-1:111122223333:certificate/abcd',
  endpointConfiguration: { types: ['REGIONAL'] },
});
const api = new apigateway.CfnRestApi(this, 'Api', {
  name: 'my-api',
  disableExecuteApiEndpoint: true,
});
new apigateway.CfnBasePathMapping(this, 'Mapping', {
  domainName: domain.ref,
  restApiId: api.ref,
});

CDK Insights pinpoints the exact file and line in your CDK source for every finding, so you can jump straight to the fix.

Affected resource types

Intentional? Suppress this finding

Sometimes a flag is deliberate — a genuinely public endpoint, say. You can dismiss apigateway-default-endpoint-enabled and the reason is kept in the report, not silently hidden.

In .cdk-insights.json:

{
  "ignoreRules": [
    { "id": "apigateway-default-endpoint-enabled", "reason": "Why this is intentional" }
  ]
}

Or inline in your CDK code:

Validations.of(scope).acknowledge({
  id: 'cdk-insights::apigateway-default-endpoint-enabled',
  reason: 'Why this is intentional',
});

Use the rule ID apigateway-default-endpoint-enabled shown above — not the CDK-* ID from SARIF / GitHub code scanning. To dismiss every finding on one construct instead, use ignorePaths. Suppression docs →

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