End of life, severity medium

Python 3.10 reached end of life on 2026-10-01

Published October 31, 2026

Python 3.10 no longer gets security fixes.

Deadline: October 1, 2026

What's affected

• python runtime>=3.10 <3.11

What to do

1. Upgrade Python to a supported version (latest 3.10.x is 3.10.22; 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-python-3-10

References

• https://endoflife.date/python

Notice eol-python-3-10, signed with key feed-prod-2026-10 (Ed25519). The Pharon CLI verifies the signature before using a notice.