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MalwareSep 23, 2026

Open-Source AI Agents Breach 27 Companies, Steal 600,000 Credit Card Records

Open-source AI agents breached 27 companies, stealing 600,000 credit card records.

Gambit Security has identified open-source AI agents that have successfully breached 27 companies. These agents stole approximately 600,000 credit card records and deployed payment skimmers on the compromised retail websites, indicating a sophisticated and targeted attack.

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The lesson from this incident

Full lesson

Attackers leveraged open-source AI agents to autonomously identify, exploit, and breach 27 companies, stealing approximately 600,000 credit card records and deploying payment skimmers on retail websites. This represents a dangerous evolution in attack sophistication, where AI-driven automation removes the traditional human bottleneck from large-scale campaigns, enabling rapid, targeted exploitation at scale. The use of open-source tooling lowers the barrier to entry for threat actors while making attribution significantly harder. Retail organizations that fail to monitor third-party integrations, web application integrity, and emerging AI-assisted attack vectors are particularly exposed. The deployment of payment skimmers also signals a Magecart-style supply chain risk that can silently harvest customer payment data over extended periods before detection.

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