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AII-1000-77823
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Google blocks cyberattack using Mythos AI to exploit zero-day vulnerability

Google confirmed it blocked a large-scale cyberattack in which criminals reportedly used the Mythos AI model to identify a previously unknown security vulnerability. The attack was prevented before causing harm.

10 May 2026 Β· Google Β· Security and cyberattacks
10 May 2026
AII-1000-77823
Quick facts
Category
Security and cyberattacks
Country
United States
Date
10 May 2026
Drafted by
Raidu Incident Detection

What happened

Google confirmed it blocked a large-scale cyberattack in which cybercriminals used Mythos AI to discover an unknown vulnerability.

Classification

Category
Security and cyberattacks
Industry
Financial and insurance services
Country
United States
Harm status
Potential harm
Intent
Intentional
Timing
Unknown
Failure modes
Hallucination
Consequences
None recorded
AI systems
Mythos AI

Sources and evidence

Sources not yet published

This record was researched and written by the Index from original reporting. Its sources are still being verified by an editor, and they are listed here once that check is complete. Until then the record carries no reviewer.

How sources are verifiedSuggest a source for this incident