AWS ACM Certificate Validity Change: 198-Day Certificates & the Road to 47 Days
On 18 February 2026, AWS quietly updated ACM to reduce the default validity of public certificates from 395 days to 198 days. If you’re running anything on AWS that terminates TLS — CloudFront distributions, Application Load Balancers, API Gateway endpoints, Elastic Beanstalk — this affects you.
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