Codex issues when Cloudflare Zero Trust VPN is connected
Resolved 💬 2 comments Opened Feb 4, 2026 by dvcrn Closed Feb 4, 2026
💡 Likely answer: A maintainer (github-actions[bot], contributor)
responded on this thread — see the highlighted reply below.
What issue are you seeing?
Since today I can no longer use Codex when connecting through Cloudflare Zero Trust Warp tunnel
When Zero Trust tunnel is connected, Codex app and Codex CLI are both returning:
stream disconnected before completion: Transport error: network error: error decoding response body
Disabling Cloudflare Zero Trust / Warp causes Codex to work again
I believe this is a bug because Zero Trust Warp tunnels are important for connecting to company infrastructure. It's possible to get around this by configuring split tunnel and excluding chatgpt.com from Cloudflare VPN
What steps can reproduce the bug?
- Enable Cloudflare Zero Trust
- Try to use Codex
What is the expected behavior?
- Codex should be working as usual
Additional information
_No response_
2 Comments
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This was a user error with my configuration