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New tool reveals bypasses in Claude Code's file access deny rules

By PulseAugur Editorial · [1 sources] ·

A developer has created a Python tool called `deny-probe` to test the effectiveness of Claude Code's permission deny rules. The tool reveals that common deny rules, such as blocking direct file reads, can be bypassed through various methods like using the `Grep` tool, executing Python one-liners via Bash, or exploiting `@import` chains in CLAUDE.md files. The `deny-probe` tool offers both static analysis of deny rules and a live mode to actively test bypass routes against actual Claude sessions, providing hardening suggestions to better secure sensitive data. AI

IMPACT Highlights potential security vulnerabilities in AI agent permission systems, prompting developers to re-evaluate their security configurations.

RANK_REASON A user-created tool that analyzes and tests a specific feature of an AI product.

Read on dev.to — Claude Code tag →

AI-generated summary · Google Gemini · from 1 sources. How we write summaries →

New tool reveals bypasses in Claude Code's file access deny rules

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5 / 100
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A user-created tool that analyzes and tests a specific feature of an AI product.
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product, other
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High
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COVERAGE [1]

  1. dev.to — Claude Code tag TIER_1 English(EN) · hao li ·

    Your Claude Code Read Deny Rule Is a Screen Door — I Built a Tool That Proves It

    <p>A recent post by <a class="mentioned-user" href="https://dev.to/rulestack">@rulestack</a> stopped me cold: they ran 20 real <code>claude -p</code> sessions against a <code>Read(./.env)</code> deny rule and found <strong>4 of 11 exfiltration routes sailed straight through</stro…

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