Bottom line: A security vulnerability in AWS Kiro allowed manipulation of IDE configuration and remote code execution through hidden content on websites without an approval mechanism.
Intezer and Kodem Security discovered a critical security flaw in Kiro (AWS’s agent-based coding IDE) that made it possible to manipulate the IDE’s configuration and execute arbitrary code. Hidden text on a web page was sufficient to exploit the vulnerability—for instance, in simple requests such as summarizing content.
Intezer and Kodem Security demonstrated that an attacker could achieve remote code execution on a developer’s machine via hidden or manipulated text content on a web page. It made no difference whether the request to Kiro appeared benign (for example, summarizing a page)—the agent-based IDE executed the injected instruction and manipulated its own configuration.
A critical aspect of the vulnerability was the absence of an approval level that could have blocked such write access to the configuration. This allowed an attacker not only to execute code but also to prepare the environment for future exploits or establish persistent access.
AWS has already patched the vulnerability. The flaw highlights the risk of agent-based systems that process and interpret web content directly without first checking content for manipulation.
Source: thehackernews.com · Published 21 July 2026
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