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Claude Code Skills Pose Security Risk Via Hidden Commands and Hooks

By PulseAugur Editorial · [1 sources] ·

A security vulnerability has been identified in Claude Code's 'Skills' feature, allowing malicious code execution before Claude processes the content. Skills, defined as folders with a SKILL.md file, can contain executable commands, pre-approved tools, and session-persistent hooks. These elements can be exploited to run shell commands without explicit user permission, grant broad tool access, or maintain background processes. The article details these four potential risks and provides a Python script to help users identify them within skill folders. AI

IMPACT Users of Claude Code should exercise caution when installing third-party skills, as they can execute commands and grant tool access without explicit prompts.

RANK_REASON The article details a security vulnerability in a specific feature (Skills) of a product (Claude Code), providing technical details and a mitigation script.

Read on dev.to — Claude Code tag →

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

Claude Code Skills Pose Security Risk Via Hidden Commands and Hooks

How we ranked this

Signal score
52 / 100
Composite score across the factors below. Higher = stronger signal that this story matters right now.
Newsworthiness bucket
Tool
The article details a security vulnerability in a specific feature (Skills) of a product (Claude Code), providing technical details and a mitigation script.
Source corroboration
Single-source cluster
Only one publisher covered this so far. Single-source stories can still rank when the publisher is high-authority, but they lack cross-source corroboration.
Topics
product, safety
Editorial topic classification. Feeds into how the story surfaces on /topic/<slug> hub pages and into the per-entity coverage mix.
AI-industry relevance
High
Clearly on-topic for AI-industry coverage.
Story freshness
Breaking (< 6h)
Fresh story with cross-source coverage still developing. Ranking may shift as more sources report.

Full methodology in our editorial standards.

COVERAGE [1]

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

    A Skill Can Run Commands Before Claude Reads It: What to Check First

    <p>You find a skill on GitHub that writes release notes. It looks harmless: a <code>SKILL.md</code> with a description and a few lines of instructions. You copy the folder into <code>.claude/skills/</code>, ask for release notes, and it works.</p> <p>What you may not have checked…

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