https://okulbida.com/tags/ssl/ Recent content in ssl on Oleksandr Kulbida Hugo -- gohugo.io Wed, 29 Apr 2026 00:00:00 +0200 https://okulbida.com/posts/eks-python-urllib3-ssl-certificate-verify-failed/ Wed, 29 Apr 2026 00:00:00 +0200 https://okulbida.com/posts/eks-python-urllib3-ssl-certificate-verify-failed/ Bumped to Python 3.13 and suddenly your Kubernetes automation stopped working? Here’s the error you’re probably seeing: urllib3.exceptions.MaxRetryError: HTTPSConnectionPool(host='xxxx.gr7.us-east-1.eks.amazonaws.com', port=443): Max retries exceeded with url: /version/ (Caused by SSLError(SSLCertVerificationError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: Missing Authority Key Identifier (_ssl.c:1028)'))) Nothing changed on the cluster side. The problem is on your machine — specifically the combination of Python 3.13 and urllib3 2.4.0. Tracked in kubernetes-client/python#2394. What’s actually going on Python 3.13 made SSL certificate validation stricter.