Dev Tools · 1h ago
App's anti-theft feature locks out every user due to false positives
A solo developer's finance app implemented refresh-token reuse detection, which revokes all sessions when a revoked token is replayed. However, benign scenarios like lost responses or racing processes caused same-device replays, triggering the nuke and logging out the developer. The fix scopes the scorched-earth response to replays from different devices, not the same one.
Meridian48 take
The incident highlights how textbook security can backfire without accounting for real-world edge cases, a cautionary tale for developers implementing OWASP recommendations.
securitytoken-authentication