Cursor CLI version mismatch 1) breaks remote tunnels and 2) can't be updated

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Cursor CLI version mismatch 1) breaks remote tunnels and 2) can’t be updated

Thanks for reporting a bug you have found in Cursor!
Please add the following info to help us diagnose your issue:

:white_check_mark: Check the forum to ensure the issue hasn’t been reported already
:lady_beetle: Provide a clear description of the bug
:counterclockwise_arrows_button: Explain how to reproduce the bug (if known)
:camera: Attach screenshots or recordings (e.g., .jpg, .png, .mp4).
:laptop: Tell us your operating system and your Cursor version (e.g., Windows, 0.x.x).
:prohibited: Tell us if the issue stops you from using Cursor.

:lady_beetle: My cursor-tunnel has stopped working: it’ll just hang on “Opening Remote” / “Connecting to dev-gpu” and then time out with “Failed to connect to the remote extension host server (Error: WebSocket close with status code 1006)”. This started happening on Friday and O3 and I haven’t been able to figure it out yet.

rm -rf ~/.cursor* doesn’t fix it.

My leading theory is a version mismatch:

  • My laptop’s cursor --version is 0.50.7 (the latest available).
  • The CLI on worker nodes /mnt/polished-lake/scripts/code-servers/cursor --version is at 0.45.14.

However, it’s been surprisingly tough to bring them in line:

  • Trying to upgrade the CLI with /mnt/polished-lake/scripts/code-servers/cursor update incorrectly prints that it’s already up-to-date. (Cursor bug?)
  • Downgrading my local Cursor to 0.48 (the oldest available on Downloads | Cursor - The AI Code Editor) doesn’t fix it. Reinstalling a new tunnel at 0.48 does it, but Cursor auto-updates itself on restart, re-breaking the tunnel.
  • We found the CLI via a link we found in a forum post here: https://api2.cursor.sh/updates/download-latest?os=cli-alpine-x64. However, this still installs 0.45.
  • It’s not easy/obvious for how to install a CLI manually (surely I’m missing something here?). So I downloaded the Linux x64 .AppImage manually, SCP’d it to the Kubernetes control plane, unpacked the .AppImage with ./cursor.v50.AppImage --appimage-extract, then dug into the resulting app directory and tried executing each of the 8 cursor files inside of the app directory but none of them are the CLI.

:laptop: Locally, I’m on Mac Sequoia 15.1. My Kube control plane and worker nodes are Linux x86_64 machines running Ubuntu 22.04.5 LTS.
:prohibited: Yes, this prevents me from using Cursor.