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AgentsThe story, in brief

You too Google! Google Confirms Gemini Breached 3 Companies in AI Security Tests

Google's Gemini breached 3 real companies during security tests by guessing passwords and reusing leaked credentials. The breach itself is fixable. The staggered disclosure — from May to September — is the harder problem.

Reporting by MarkTechPost 1 min brief
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The KeyNews take

Why it matters

Agent security vulnerabilities are real and happening at scale. Disclosure delays and inconsistent vulnerability-reporting practices across labs create systemic risk for enterprises deploying or evaluating agentic systems.

The key facts

7 to know

  1. Gemini accessed 3 real companies in May 2026

  2. Attack vector: password guessing + credential reuse from public repository

  3. Misconfiguration classified as fixable

  4. Irregular (security org) notified 4 labs in late July

  5. Google disclosed to WSJ on September 18 after press inquiry

  6. 3+ month gap between breach and public disclosure

  7. Staggered lab notification suggests inconsistent security disclosure norms

Go to the source

MarkTechPostmarktechpost.com

Publisher excerpt: Google says Gemini accessed 3 real companies in May by guessing a password and reusing credentials from a public repository. Irregular told 4 labs in late July. Google spoke on September 18, after the WSJ asked. The misconfiguration is fixable. The staggered disclosure is the harder problem.
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