CVE-2026-33854: Android-ImageMagick7 Buffer Overflow Flaw

CVE-2026-33854 Overview

CVE-2026-33854 is an Out-of-bounds Write vulnerability affecting MolotovCherry Android-ImageMagick7, a library that provides ImageMagick functionality for Android applications. This memory corruption vulnerability allows attackers to write data beyond the allocated buffer boundaries, potentially leading to arbitrary code execution, application crashes, or data corruption on affected Android devices.

Critical Impact

This out-of-bounds write vulnerability can be exploited remotely without authentication, potentially allowing attackers to execute arbitrary code or cause denial of service on Android applications using vulnerable versions of Android-ImageMagick7.

Affected Products

• MolotovCherry Android-ImageMagick7 versions prior to 7.1.2-10

Discovery Timeline

• 2026-03-24 - CVE CVE-2026-33854 published to NVD
• 2026-03-26 - Last updated in NVD database

Technical Details for CVE-2026-33854

Vulnerability Analysis

This vulnerability is classified as CWE-787 (Out-of-bounds Write), a memory corruption issue where an application writes data past the end or before the beginning of an intended buffer. In the context of Android-ImageMagick7, this type of vulnerability typically occurs during image processing operations where input data can influence memory write operations without proper bounds checking.

The network-accessible attack vector combined with no required privileges or user interaction makes this vulnerability particularly dangerous for mobile applications that process untrusted image content from external sources. Android applications using vulnerable versions of this library to process user-uploaded images, downloaded content, or images from third-party sources are at significant risk.

Root Cause

The root cause stems from insufficient bounds validation when processing image data within the Android-ImageMagick7 library. When the library handles specially crafted image files, it fails to properly validate buffer boundaries before writing data, allowing an attacker to corrupt adjacent memory regions. This can lead to control flow hijacking, arbitrary code execution, or application instability.

Attack Vector

The vulnerability can be exploited remotely over the network. An attacker can craft a malicious image file designed to trigger the out-of-bounds write condition when processed by an affected application. Attack scenarios include:

• Sending malicious images through messaging applications that use Android-ImageMagick7 for image processing
• Hosting malicious images on websites that are downloaded and processed by vulnerable applications
• Exploiting file upload functionality in applications that perform server-side or client-side image manipulation

The vulnerability exploits memory write operations during image parsing or transformation. When the library encounters specific malformed structures in an image file, it miscalculates buffer sizes or offsets, resulting in writes to unintended memory locations. Technical details can be found in the GitHub Pull Request #184 that addresses this issue.

Detection Methods for CVE-2026-33854

Indicators of Compromise

• Unexpected application crashes during image processing operations
• Memory corruption errors or segmentation faults in Android log files related to ImageMagick processing
• Unusual network requests attempting to deliver potentially malicious image files

Detection Strategies

• Implement application crash monitoring to detect patterns consistent with memory corruption exploits
• Deploy runtime application self-protection (RASP) solutions capable of detecting out-of-bounds write attempts
• Monitor for anomalous image files with unusual metadata or structure being processed by applications

Monitoring Recommendations

• Enable verbose logging for image processing components to capture detailed error information
• Implement file integrity monitoring for applications using Android-ImageMagick7
• Configure alerting for memory-related exceptions in application crash reporting systems

How to Mitigate CVE-2026-33854

Immediate Actions Required

• Upgrade Android-ImageMagick7 to version 7.1.2-10 or later immediately
• Audit applications to identify all instances using vulnerable versions of the library
• Implement input validation to restrict accepted image formats and sizes as an additional defense layer
• Consider temporarily disabling image processing features if immediate patching is not possible

Patch Information

The vulnerability has been addressed in Android-ImageMagick7 version 7.1.2-10. The fix is documented in GitHub Pull Request #184. Developers should update their dependencies to the patched version by modifying their build configuration to reference the fixed release.

Workarounds

• Implement strict input validation to filter potentially malicious image files before processing
• Use sandboxing techniques to isolate image processing operations from critical application components
• Deploy web application firewalls or content filtering to block suspicious image uploads
• Limit the image formats accepted by the application to reduce the attack surface

# Update Android-ImageMagick7 dependency to patched version
# In your build.gradle or equivalent:
# implementation 'com.github.MolotovCherry:Android-ImageMagick7:7.1.2-10'

# Verify the installed version
./gradlew dependencies | grep -i imagemagick