"The sandbox is blocking even plain file reads in this repo"

What version of Codex CLI is running?

codex-cli 0.117.0

What subscription do you have?

Enterprise

Which model were you using?

gpt-5.4 high

What platform is your computer?

Linux 6.17.0-19-generic x86_64 x86_64

What terminal emulator and version are you using (if applicable)?

Konsole

What issue are you seeing?

The model is no longer able to read things from the filesystem:

• The sandbox is blocking even plain file reads in this repo, so I’m switching to narrow text searches and,
  if needed, a one-off escalated read to inspect the affected code with line numbers.

What steps can reproduce the bug?

Ask it to do work.

What is the expected behavior?

Reading files from disk works.

Additional information

Very likely a regression from https://github.com/openai/codex/pull/15693