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X's Security-Key Switchover Triggers Lockouts as Engineers Revert Changes

The move from twitter.com to x.com left origin-bound passkeys unusable until users re-register.

Overview

  • After a November 10 deadline, many accounts that hadn’t re-enrolled passkeys or hardware security keys were locked, with some users stuck in infinite verification loops.
  • Reports describe failures to receive or validate verification codes across app and web, preventing re-enrollment for affected accounts.
  • Monitoring sites recorded login issue spikes in the US and Canada, but the disruption does not appear to be a universal outage.
  • Sources say X engineers are rolling back recent changes to restore access, while the company has offered little public explanation.
  • Authenticator-app two-factor authentication remains unaffected, and users who can still log in are instructed to re-enroll security keys under x.com or switch 2FA methods.