CISA KEV catalog
Confirmed active exploitation.
Listed in CISA's catalog of Known Exploited Vulnerabilities: attackers are using it in real attacks. Patch it with priority.
- Name
- Twilio Authy Information Disclosure Vulnerability
- Added to catalog
- Remediation due date (US federal)
- Required action
- Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Description
In the Twilio Authy API, accessed by Authy Android before 25.1.0 and Authy iOS before 26.1.0, an unauthenticated endpoint provided access to certain phone-number data, as exploited in the wild in June 2024. Specifically, the endpoint accepted a stream of requests containing phone numbers, and responded with information about whether each phone number was registered with Authy. (Authy accounts were not compromised, however.)
Affected products
twilio: authy; twilio: authy authenticator
References9
- cwe.mitre.org/data/definitions/203.html Technical Description
- www.bleepingcomputer.com/news/security/hackers-abused-api-to-ve… Press/Media Coverage
- www.twilio.com/docs/usage/security/reporting-vulnerabilities Product
- www.twilio.com/en-us/changelog Release Notes
- cwe.mitre.org/data/definitions/203.html Technical Description
- www.bleepingcomputer.com/news/security/hackers-abused-api-to-ve… Press/Media Coverage
- www.twilio.com/docs/usage/security/reporting-vulnerabilities Product
- www.twilio.com/en-us/changelog Release Notes
- www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=… US Government Resource
Metrics
- CVSS 3.1
-
5.3
MEDIUM
Score source: NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N - EPSS — exploit probability
- 2% percentile: 77 · as of 3 November 2026
- CWE
- CWE-203
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