CloudFront TLS Outdated

What this rule checks

Detects CloudFront distributions using outdated TLS versions.

How to fix it

1. 1Set MinimumProtocolVersion to TLSv1.2_2021 or higher
2. 2Use a custom SSL certificate

import * as cloudfront from 'aws-cdk-lib/aws-cloudfront';
import * as origins from 'aws-cdk-lib/aws-cloudfront-origins';
import * as acm from 'aws-cdk-lib/aws-certificatemanager';

const cert = new acm.Certificate(this, 'Cert', { domainName: 'example.com', validation: acm.CertificateValidation.fromDns() });
new cloudfront.Distribution(this, 'Dist', {
  defaultBehavior: { origin: new origins.HttpOrigin('origin.example.com') },
  domainNames: ['example.com'],
  certificate: cert,
  minimumProtocolVersion: cloudfront.SecurityPolicyProtocol.TLS_V1,
});

import * as cloudfront from 'aws-cdk-lib/aws-cloudfront';
import * as origins from 'aws-cdk-lib/aws-cloudfront-origins';
import * as acm from 'aws-cdk-lib/aws-certificatemanager';

const cert = new acm.Certificate(this, 'Cert', { domainName: 'example.com', validation: acm.CertificateValidation.fromDns() });
new cloudfront.Distribution(this, 'Dist', {
  defaultBehavior: { origin: new origins.HttpOrigin('origin.example.com') },
  domainNames: ['example.com'],
  certificate: cert,
  minimumProtocolVersion: cloudfront.SecurityPolicyProtocol.TLS_V1_2_2021,
});

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 You can dismiss cloudfront-tls-outdated and the reason is kept in the report, not silently hidden.

In .cdk-insights.json:

{
  "ignoreRules": [
    { "id": "cloudfront-tls-outdated", "reason": "Why this is intentional" }
  ]
}

Or inline in your CDK code:

Validations.of(scope).acknowledge({
  id: 'cdk-insights::cloudfront-tls-outdated',
  reason: 'Why this is intentional',
});

Use the rule ID cloudfront-tls-outdated shown above — not the CDK-* ID from SARIF / GitHub code scanning.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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