“All active certificates that were issued and validated with the TLS-ALPN-01 challenge before 00:48 UTC on 26 January 2022 when our fix was deployed are considered mis-issued,” explains Let’s Encrypt Site Reliability Engineer (SRE), Jillian.
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Thanks James. It’s useful knowledge to share, but in case anyone is concerned, this will not affect those generating LE certs using stock Certificate Manager features. It does not use TLS-ALPN-01 challenges.
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