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Decompression Bombs & DoSRutvij Khatri•6 min read•Published 2026-10-14

Hardening ImageMagick and Sharp Against Malicious Image Uploads

Production-ready configuration files and security policies to restrict memory, execution limits, and disk mapping in production pipelines.

Configuring policy.xml for ImageMagick

In production Linux environments, update /etc/ImageMagick-6/policy.xml to restrict memory to 256MiB, map to 512MiB, and maximum area to 64MP.

In Node.js with Sharp, always configure { limitInputPixels: 268402689 } to reject decompression bombs before memory allocation.

#imagemagick policy xml hardening#sharp limitInputPixels#node image upload security#prevent oom crash
RK
Rutvij KhatriSecurity Analyst

Security Analyst and Aspiring Security Engineer passionate about digital image forensics, OSINT research, CTF steganography challenges, and client-side application security.

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