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TechRadar
TechRadar
Sead Fadilpašić

Three high-risk AI vulnerabilities discovered in Claude.ai – end-to-end attack chain exfiltrates sensitive info without user knowing

Mobile phone displaying a Claude login screen.

  • Oasis researchers uncover “Cloudy Day” attack chain in Claude
  • Exploits include invisible prompt injection, data exfiltration via API, and open redirects
  • Anthropic patched one flaw, fixes for remaining two underway
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