One public AI agent on AWS could take over every other agent in its region
AIZenity Labs says a single publicly accessible agent on Amazon Bedrock AgentCore could take over all AgentCore agents in the same AWS account and region. A chat prompt let the researchers query the instance metadata service and steal temporary credentials, and AgentCore's default permissions allowed read, write, and delete access across agents. According to Zenity, AWS made IMDSv2 the default for new deployments and changed the default execution role around August.
Why it matters: The report traces how one public agent's weak isolation exposed credentials and every other agent in the region, showing why default permissions matter for enterprise deployments.








