Auth0 / update detail

Multi-Factor Authentication: Exponential Backoff for Phone MFA SMS Delivery

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Auth0·Oct 30, 2026, 12:00 AMFeatureSecurity-relevantAI-assisted summary

Summary

Adds exponential backoff for Phone MFA SMS delivery, replacing static rate limits with progressive delays up to 32 minutes.
Mitigates SMS pumping and toll‑fraud attacks while preserving usability for legitimate users.
Logs throttled attempts as `limit_phone` events and automatically decays cooldowns after inactivity.

featuresecuritysource healthy

Official source Last checked Nov 4, 2026, 9:01 AM

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AI-assisted summarysource healthyLast checked Nov 4, 2026, 9:01 AM

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