Podman: unable to upgrade to tcp, received 500

[eloo-abi]

What happened?

Since the update to 2.3.0 the crossplane cli is not working anymore in my setup.
Version 2.2.0 is running without any issues.
I am using podman with rootful setup.

How can we reproduce it?

• Install podman 6.1.0
• Create rootful machine
• Try "crossplane composition render"
• Fail with:

2026-08-21T18:28:39+02:00       DEBUG   Function container reachable on network {"network": "crossplane-render-9jnm6ht7", "address": "hardcore_hodgkin:9443"}
2026-08-21T18:28:39+02:00       DEBUG   Running crossplane internal render in Docker    {"image": "xpkg.crossplane.io/crossplane/crossplane:stable", "network": "crossplane-render-9jnm6ht7"}
crossplane: error: cannot render composite resource: crossplane internal render in Docker returned error with output: : failed to attach to container: unable to upgrade to tcp, received 500

What environment did it happen in?

• Crossplane CLI version: 2.3.0 -> 2.5.0
• Platform (e.g., linux/amd64): macos arm64
• Crossplane version (if applicable):