CISA-confirmed known exploited vulnerability

CVE-2024-39891

Twilio Authy Information Disclosure Vulnerability

Twilio · Authy

Vulnerability details

Twilio Authy contains an information disclosure vulnerability in its API that allows an unauthenticated endpoint to accept a request containing a phone number and respond with information about whether the phone number was registered with Authy.

Added to CISA KEV: 2024-07-23

Ransomware campaign use: Unknown

CISA due date: 2024-08-13

Defensive guidance from CISA

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

This is the source's required-action field, not an independently validated patch procedure. Refer to the vendor for exact affected versions and fixes.

Source catalog date: 2026-11-06T19:44:45.1797Z · Last retrieved: 2026-11-06 21:02:26 UTC

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