Multiple Cybersecurity Incidents Reported in Late March 2026

A White House mobile app was found to expose sensitive backend infrastructure details, including API keys and internal server paths, due to misconfigured security settings. The European Commission confirmed a cyber breach affecting its Microsoft 365 cloud environment, though no specific data loss or attacker attribution was disclosed. OpenAI patched a data leak in ChatGPT that allowed users to view conversation titles from other users' chat histories, which was active for a limited time. The incidents occurred in late March 2026, with no exact dates or technical identifiers (e.g., CVE IDs) provided for the vulnerabilities. The White House app exposure was attributed to improper access controls, while the ChatGPT leak stemmed from a software flaw in session handling.