Codex stopped working with github actions openai/codex-action@v1

What version of Codex is running?

0.84.0

What subscription do you have?

ChatGPT Business

Which model were you using?

_No response_

What platform is your computer?

_No response_

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

_No response_

What issue are you seeing?

Yesterday our github actions codex script worked fine. It used version 0.80.0 . Today it's taking new version of 0.84.0 which make Landlock failure.

Action:

jobs:
  codex:
    runs-on: ubuntu-latest
    permissions:
      contents: read
    outputs:
      final_message: ${{ steps.run_codex.outputs['final-message'] }}
    steps:
...
- name: Run Codex
        id: run_codex
        uses: openai/codex-action@v1
        with:
          openai-api-key: ${{ secrets.OPENAI_API_KEY }}
          prompt: |
            This is PR #${{ github.event.pull_request.number }} for ${{ github.repository }}.
            Base SHA: ${{ github.event.pull_request.base.sha }}
            Head SHA: ${{ github.event.pull_request.head.sha }}

            Review ONLY the changes introduced by the PR.
            Suggest any improvements, potential bugs, or issues.
            Be concise and specific in your feedback.

            Pull request title and body:
            ----
            ${{ github.event.pull_request.title }}
            ${{ github.event.pull_request.body }}

Error log:

thinking
**Reviewing code changes between SHAs**
2026-01-15T09:31:16.934869Z ERROR codex_core::codex: needs_follow_up: true
exec
/bin/bash -lc 'git diff --stat 4f6af8e90f6d7a6e2269b40f5d13518b050bd72b 44c207e5d208a014711742250deee789d3d80814' in /home/runner/work/api/api exited 101 in 3ms:

thread 'main' panicked at linux-sandbox/src/linux_run_main.rs:30:9:
error running landlock: Io(Os { code: 13, kind: PermissionDenied, message: "Permission denied" })
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

What steps can reproduce the bug?

Create github action from openai/codex-action@v1 codex readme and it should fail when using 0.84.0 version.

What is the expected behavior?

_No response_

Additional information

_No response_