https://securityblueprints.io/tags/api-security/ Recent content in API Security on Security Blueprints Hugo en user@example.com (Niels Provos) user@example.com (Niels Provos) Security Blueprints, LLC Sun, 06 Sep 2026 23:57:45 +0000 https://securityblueprints.io/data-breaches/t-mobile-january-2023-data-breach/ Fri, 25 Nov 2022 00:00:00 +0000user@example.com (Niels Provos) https://securityblueprints.io/data-breaches/t-mobile-january-2023-data-breach/ Executive Summary In January 2023, T-Mobile disclosed a significant data breach that affected approximately 37 million current customers. The breach, initiated through unauthorized access to an API, began in late November 2022. T-Mobile detected the breach on January 5, 2023, and publicly disclosed it on January 19, 2023. Technical Details The breach was facilitated through a vulnerability in an API, which allowed attackers to access personal data, including names, billing addresses, email addresses, phone numbers, and dates of birth.