End of life, severity medium

Kubernetes 1.33 reached end of life on 2026-06-28

Published October 31, 2026

Kubernetes 1.33 no longer gets security fixes.

Deadline: June 28, 2026

What's affected

• kubernetes>=1.33 <1.34

What to do

1. Upgrade Kubernetes to a supported version (latest 1.33.x is 1.33.13; move to a newer cycle).

Check whether you were affected

Pharon tells teams automatically when this affects something they run. To check a machine, run this in Claude Code with the Pharon plugin, in the repository that uses it:

/pharon:check-incident eol-kubernetes-1-33

References

• https://endoflife.date/kubernetes

Notice eol-kubernetes-1-33, signed with key feed-prod-2026-10 (Ed25519). The Pharon CLI verifies the signature before using a notice.