[BUG] Claude in Chrome: bridge returns "OAuth token forbidden (403)", reason upstream_403, transient:false since 10 Nov #109203

Preflight Checklist

• I have searched existing issues and this hasn't been reported yet
• This is a single bug report (please file separate reports for different bugs)
• I am using the latest version of Claude Code

What's Wrong?

Since 10 Nov 2026 ~07:40 (UTC+2) Claude in Chrome cannot connect. Every connection to wss://bridge.claudeusercontent.com/chrome/ is closed immediately (code 1008). Reproduced in Claude Desktop (Code tab) and in Claude Code CLI with a separate fresh /login and --chrome. Other Desktop features using the same bridge host (remote control, remote tools device) authenticate fine, only the /chrome endpoint is rejected. Personal Max plan, no org admin, no IP allowlist, direct connection without VPN/proxy. The extension and the app use the same account and org.

What Should Happen?

The bridge should accept the connection and pair with the Chrome extension, as it did until 9 Nov 21:49.

Error Messages/Logs

[Claude in Chrome] Bridge received: {"type":"error","error":"OAuth token forbidden (403) - missing scope, org access, or network not allowed by org","reason":"upstream_403","upstream_status":403,"transient":false}
[Claude in Chrome] Bridge connection closed (code: 1008, duration: 0ms)
[claude-in-chrome] Giving up bridge reconnection after 100 attempts

Steps to Reproduce

1. Windows 11, Chrome with Claude in Chrome extension 1.0.106 signed in.
2. Start Claude Desktop 4.23118.1 or run claude --chrome (CLI 2.1.321) and log in.
3. Ask Claude to use any Chrome tool (e.g. tabs_context_mcp).
4. Result: "Claude in Chrome is not connected"; the log shows the 403 above on every attempt.
   Already tried: sign out/in, restart Chrome and the app, wait 48+ hours.

Claude Model

Opus

Is this a regression?

Yes, this worked in a previous version

Last Working Version

Claude Desktop 4.23118.0 (worked until 9 Nov 2026).

Claude Code Version

2.1.321.

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

PowerShell

Additional Information

Started right after the auto-update of Claude Desktop 4.23118.0 -> 4.23118.1 and the extension to 1.0.106 on 10 Nov 07:40. The same 403 happened on 9 Nov 17:00-18:03 and recovered by itself. Support conversation opened on 10 Nov, handed to a human, no reply yet.