By then, certificates will have a maximum lifetime of 200 days, with further reductions leading to a 47-day lifetime and a 10-day domain control validation (DCV) reuse period by 2029.

Notably, the CA/Browser Forum has announced that starting March 2026, certificate lifetimes and domain control validation (DCV) re-use periods will be reduced to 200 days.

Patch Windows 10 and Server now because certificate validation is broken Crypto library bug allows spoofing of certificates, but no attacks in wild—yet. Sean Gallagher – Jan 14, 2020 3:40 pm | 89 ...

A high-severity bug in OpenSSL was disclosed today, and it affects only organizations that installed an update released in June, and allows anyone with an untrusted TLS certificate to become a CA.

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