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AI Coding Agents Vulnerable to Prompt Injection via Trusted Files

By PulseAugur Editorial · [2 sources] ·

A security researcher has detailed how a file named AGENTS.md, intended to guide AI coding agents, can be exploited through prompt injection techniques. This method allows an attacker to control the agent's actions by embedding malicious instructions within the AGENTS.md file, which agents often treat as trusted. The research, demonstrated against Codex with a reported success rate over 90% in testing, highlights that context files should be treated with the same security scrutiny as code. Additionally, a related risk for Claude Code involves the potential redirection of API traffic via the ANTHROPIC_BASE_URL variable, which could lead to credential theft if not properly secured. AI

IMPACT Highlights critical security risks in AI agent context handling and API configuration, necessitating stricter review processes for agent interactions.

RANK_REASON Security research detailing a prompt-injection vulnerability in AI coding agents.

Read on dev.to — Claude Code tag →

AI-generated summary · Google Gemini · from 2 sources. How we write summaries →

AI Coding Agents Vulnerable to Prompt Injection via Trusted Files

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Security research detailing a prompt-injection vulnerability in AI coding agents.
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COVERAGE [2]

  1. dev.to — Claude Code tag TIER_1 English(EN) · Sam Stull ·

    How many tokens is 1% of your Claude Code limit?

    <p><em>Originally published at <a href="https://limitcast.dev/blog/tokens-per-percent/" rel="noopener noreferrer">limitcast.dev</a>.</em></p> <p>Anthropic shows how much of your 5-hour and weekly limit you've used, as a percentage. It doesn't say how many tokens that percentage i…

  2. dev.to — LLM tag TIER_1 English(EN) · Sarah Reid ·

    Your AGENTS.md Is an Attack Surface: How a Trusted File Hijacked Codex and Claude Code

    <p>By Sarah Reid, Securetron. I work at Securetron, and this article explains research into a prompt-injection technique affecting AI coding agents — and the controls that help stop it.</p> <p>AGENTS.md was meant to make coding agents more useful. Put project instructions in one …

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