AWS Kiro Flaw Let a Poisoned Web Page Rewrite Its Config and Run Code

Researchers from Intezer and Kodem Security discovered a vulnerability in AWS Kiro, an agentic coding IDE, that allowed a poisoned web page with hidden text to manipulate Kiro into rewriting its configuration file (mcp.json) and executing attacker-controlled code without user approval. The attack exploited Kiro's ability to autonomously write to and reload the mcp.json file, bypassing the intended human approval security boundary. Although AWS has patched the issue in version 0.11.130, no CVE was assigned, and the flaw highlights a recurring pattern in AI coding assistants where prompt injection leads to remote code execution.

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