CVE-2024-39891
Twilio Authy Information Disclosure Vulnerability
What is affected
| Vendor | Twilio |
|---|---|
| Product | Authy |
| Weakness | CWE-203 |
The vulnerability
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.
Required action
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
US federal civilian agencies were required to act by 13 August 2024 under BOD 22-01. The deadline is a compliance date, not a measure of severity — it says nothing about how dangerous the flaw is to anyone else.
Where this comes from
Every field on this page is taken from the CISA Known Exploited Vulnerabilities catalog, last synced 12 Nov 2026, 00:29. Nothing here is our own assessment. For the technical scoring, see the NVD record below.