Comment by aftbit

Or - you can just upgrade pip with a SHA hash pin, or set the magic env vars to use the system bundle.

You do need to be careful about creating new venvs with the old version of pip bundled in ensurepip in older Python releases. `uv` kindly patches that to newest pip, but not every Python binary does.

  python -m pip install "pip @ https://files.pythonhosted.org/packages/3f/06/3e4420302363fbb71be3c7f35ce042f54bfca330e3e66b3a2e3c4cca579f/pip-26.2.2-py3-none-any.whl#sha256=fd7f4dfa8190e014013b9f08f3e973f4e4c26ffd179a204895533a7254813a70"

Or alternatively, on Debian with fixed system cert chain:

  PIP_USE_DEPRECATED=legacy-certs PIP_CERT=/etc/ssl/certs/ca-certificates.crt python -m pip install --upgrade "pip>=26.2.2"

https://discuss.python.org/t/avoiding-compromised-certificat...