CVE-2026-22770
📋 TL;DR
ImageMagick versions before 7.1.2-13 contain a memory corruption vulnerability in the BilateralBlurImage method. When memory allocation fails, an uninitialized pointer is released, potentially causing crashes or arbitrary code execution. Anyone using vulnerable ImageMagick versions for image processing is affected.
💻 Affected Systems
- ImageMagick
📦 What is this software?
Imagemagick by Imagemagick
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete system compromise if ImageMagick processes untrusted images from external sources.
Likely Case
Application crashes (denial of service) when processing malformed images, potentially disrupting image processing services.
If Mitigated
Limited impact with proper sandboxing and input validation, potentially just crashes in isolated processes.
🎯 Exploit Status
Exploitation requires crafting a specific malformed image that triggers the memory allocation failure condition.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 7.1.2-13 and later
Vendor Advisory: https://github.com/ImageMagick/ImageMagick/security/advisories/GHSA-39h3-g67r-7g3c
Restart Required: No
Instructions:
1. Check current version: magick --version
2. Update via package manager: sudo apt update && sudo apt upgrade imagemagick (Debian/Ubuntu) or sudo yum update imagemagick (RHEL/CentOS)
3. For source installations: Download latest from https://imagemagick.org and compile
4. Verify update: magick --version should show 7.1.2-13 or higher
🔧 Temporary Workarounds
Disable BilateralBlur filter
linuxRemove or disable the BilateralBlurImage functionality via policy.xml
Edit /etc/ImageMagick-7/policy.xml and add: <policy domain="coder" rights="none" pattern="BILATERALBLUR" />
Sandbox ImageMagick
allRun ImageMagick in restricted environment with limited permissions
Use Docker containers with minimal privileges: docker run --read-only --cap-drop=ALL -v /tmp:/tmp:ro imagemagick
🧯 If You Can't Patch
- Implement strict input validation for image uploads, rejecting suspicious files
- Deploy web application firewall (WAF) rules to block malformed image uploads
🔍 How to Verify
Check if Vulnerable:
Run: magick --version | grep -E 'Version: ImageMagick [0-9]\.[0-9]\.[0-9]-[0-9]+' and check if version is below 7.1.2-13Check Version:
magick --version | grep 'Version:'Verify Fix Applied:
Confirm version is 7.1.2-13 or higher with: magick --version📡 Detection & Monitoring
Log Indicators:
- Segmentation fault or crash logs from ImageMagick processes
- Error messages mentioning 'BilateralBlurImage' or memory allocation failures
Network Indicators:
- Unusual image upload patterns to web applications
- Multiple failed image processing requests
SIEM Query:
source="*imagemagick*" AND ("segmentation fault" OR "SIGSEGV" OR "memory corruption")