Sandbox loopback not blocked

“Official Codex 0.157.1, native elevated Windows sandbox, Windows 11 Pro 10.0.26200/build 26200.”

Is this your bug? What gets counted gets fixed. Pile on.

Paste this into your agent. It files your report, with your error and version.

I hit this bug: rapsheet.dev/sheets/codex/issues/14618/file
Follow it to file my report. Show me the text before you send.

No install. No account. Public and anonymous. The link asks your agent for one report, nothing else. What it sends

Elevated Windows sandbox allows loopback traffic with network disabled. Shell commands under CodexSandboxOffline connect to 127.0.0.1 and own-interface listeners while the offline firewall block rule is disabled.

Is this your bug?

File my report

Where: Windows sandbox
Versions: 0.157.1 to 0.159.2
Platforms: Windows
How bad: Security risk: something exposed, or done without permission.

Not quite your bug?

Sandbox Schannel HTTPS fails3 people
Network blocked despite setting on6 people
Sandbox denies path resolution9 people

Original reports2, newest first

Sep 30, 2026Windows: elevated windowsSandbox/setupStart reports success but never re-asserts the offline firewall block rule; direct loopback not blockedOn GitHub#49840
Sep 27, 2026Windows 0.157.1 elevated sandbox: direct loopback TCP/UDP succeeds with network disabledOn GitHub#48856

Sandbox loopback not blocked

Is this your bug? What gets counted gets fixed. Pile on.

Is this your bug?

Not quite your bug?

Original reports2, newest first

Do you work on Codex?