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TechRadar
TechRadar
Sead Fadilpašić

'A hard truth for the AI era: don’t assume AI tools are secure by default': OpenAI patches flaw allowing silent data leakage from ChatGPT conversations without users ever knowing

ChatGPT logo on a phone.

  • Check Point Research found ChatGPT flaw enabling silent data exfiltration via DNS abuse and prompt injection
  • Vulnerability allowed attackers to bypass guardrails and steal sensitive user data through covert domain queries
  • OpenAI patched issue on Feb 20, 2026, marking second major fix that week after Codex command injection flaw
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