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Codex CLI

OpenAI · CLI

Codex CLI 0.158.0-alpha.13

0.158.0-alpha.12→0.158.0-alpha.13·September 25, 2026 at 6:17 AM UTC

Patch alpha: exec-server can isolate or inherit the Linux PID namespace for sandboxed processes.

Changelog

  • [new] codex exec-server and codex exec-server forward accept --linux-sandbox-pid-namespace (isolate, the default, or inherit). Inherit allows signals to other processes with the same UID; enable it only when provisioning a dedicated environment.
  • [changed] Bash, fish, and zsh completions include --linux-sandbox-pid-namespace.

Under the hood

  • Added an exclude_slash_tmp configuration option.
  • Exec-server sandboxing now carries PID-namespace policy so isolate vs inherit can be selected per server.

Upgrade notes

  • --linux-sandbox-pid-namespace defaults to isolate (previous behavior). Use inherit only in a dedicated environment; sandboxed processes can then signal other same-UID processes on the host.

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