AWS AgentCore Harness default configs enable prompt-injection credential theft

Fri, 18 Sep 2026 14:58:07 +0000

Engineer — Plan: If you run AWS AgentCore Harness for AI agent workloads, audit your default IAM role assignments and trust boundaries this quarter — the research identifies specific misconfigurations that allow injected prompts to reach credential storage. No active exploitation or PoC noted, but the hardening steps are concrete and low-effort.
SOC/IR — Learn: The prompt-injection-to-credential-exfiltration path in AI agent runtimes is a maturing attack class worth understanding for future detection coverage, but no IOCs, active campaigns, or ATT&CK mappings are surfaced here to act on today.
Leader — Learn: This illustrates the emerging risk of AI agent frameworks inheriting over-privileged identities — useful context for shaping an AI/LLM agent governance policy before the attack surface grows, but no immediate leadership action is required.

Aws-Agentcore on CuraSec