Possible expired ISRG Root X2 cert included in chain starting ~May28th? - Help - Let's Encrypt Community Support
Can someone else confirm - I do not have any Let's Encrypt-issued certificates, but I have been encountering problems with the chain-of-trust in certificates issued to vendors as early as 2026-05-28 22:50:39Z. I am still working with two vendors to determine if they have configured an invalid chain-of-trust, or they are receiving it from Let's Encrypt, but since both worked fine before 5/28 and now have the same error, I suspect it is from Let's Encrypt. (One received new certificates 5/28, the ...