Agents

Single prompt could hijack all AI agents in an AWS account, Zenity researchers find

Original titleA single prompt was enough to hijack every AI agent in an AWS account, Zenity researchers found

Outlet: The Decoder
Published: Oct 8, 2026
Importance: 3/5

Summary

Zenity Labs researchers discovered that a single publicly accessible AI agent on Amazon Bedrock AgentCore could be used to take over all AgentCore agents in the same AWS account and region. AWS has since patched the vulnerability and tightened default permissions.

Original excerpt

Zenity Labs researchers say a single publicly accessible AI agent on Amazon's Bedrock AgentCore was enough to take over every AgentCore agent in the same AWS account and region. The attack exploited an internal AWS interface for temporary cloud credentials that agents could reach without restriction. AWS has since patched the issue and significantly tightened the agents' default permissions. The article A single prompt was enough to hijack every AI agent in an AWS account, Zenity researchers found appeared first on The Decoder.

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