{/* JSON-LD schema is generated server-side in app/blog/[slug]/page.tsx , do not

re-add an inline block here, it crashes<br> MDX&#39;s Acorn parser on the leading <code>{</code>. */}</p> <h2> <a name="tldr" href="#tldr" class="anchor"> </a> TL;DR </h2>

<p>In February 2026, Snyk published the <a href="https://snyk.io/blog/toxicskills-malicious-ai-agent-skills-clawhub/">ToxicSkills audit</a>, the first large-scale security review of the public Claude Code skills ecosystem. It scanned 3,984 skills from ClawHub and skills.sh. Findings:</p>

<ul> <li><strong>13.4%</strong> contained critical-level issues</li> <li><strong>36%</strong> carried prompt-injection payloads</li> <li><strong>1,467</strong> distinct malicious payloads</li> <li><strong>91%</strong> of confirmed malware combined natural-language jailbreaks with executable shell payloads</li> </ul>

<p>If you install a Claude Code skill today without reading its source, the probability that it can read your env vars, exfiltrate <code>~/.ssh/</code>, or…