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Amazon Kiro vulnerability enabled data exfiltration through prompt injection and Kiro Powers

The Hacker News 2026-09-21 indirect prompt injection Critical

Executive Summary

Researchers disclosed a vulnerability in Amazon Kiro, an agentic development environment, where attacker-controlled repository content could steer the agent through prompt injection and send sensitive local information to an external endpoint via Kiro Powers.

What Happened

Researchers disclosed a vulnerability in Amazon Kiro, an agentic AI development environment, where attacker-controlled repository content influenced the agent through prompt injection. The issue could cause sensitive local information to be transmitted to an external endpoint, according to the report.

Affected Products

  • Amazon Kiro

Vulnerability / Attack Technique

Indirect prompt injection via repository content leading to data exfiltration

Technical Mechanism

Instructions planted in repository files were read by the Kiro agent, which then used Kiro Powers to transmit local data to an attacker endpoint.

AI Security Category

LLM01:2025 Prompt Injection

Part of the Prompt Injection topic.

Relevant Frameworks

LLM01:2025 Prompt InjectionLLM02:2025 Sensitive Information DisclosureMITRE ATLAS: Exfiltration

RealGround Analysis

Opening an untrusted repository in an agentic IDE is now a data-exposure event. RealGround analysis: agentic IDEs should not have unrestricted outbound network access while reading untrusted code.

Recommended Controls

  • Update Amazon Kiro to the fixed version
  • Restrict agentic IDE network egress
  • Open untrusted repositories in an isolated environment

Related RealGround Service

Secure AI Agent Build · or start with the free AI Agent Security Scanner.

Sources

The Hacker News: https://thehackernews.com/search/label/Application%20Security?m=1&hl=ko_KR

Summary and analysis written by RealGround from the source above; last updated 2026-10-17.

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