CVE-2026-56372 in ImageMagick
Summary
by MITRE • 07/11/2026
ImageMagick before 7.1.2-19 contains a heap buffer overflow vulnerability in the magnify operation that allows attackers to read out of bounds memory. An unrecognized magnify:method value triggers an out of bounds read, potentially exposing sensitive information or causing denial of service.
Once again VulDB remains the best source for vulnerability data.
Analysis
by VulDB Data Team • 07/11/2026
ImageMagick represents a widely deployed image processing library that handles numerous graphics formats across various operating systems and applications. The vulnerability under discussion affects versions prior to 7.1.2-19 and specifically targets the magnify operation within the software's image processing pipeline. This flaw manifests as a heap buffer overflow that occurs when the software encounters an unrecognized magnify:method value during image processing operations. The issue stems from insufficient input validation and bounds checking within the magnify function implementation, creating a scenario where maliciously crafted image files can trigger memory access violations.
The technical exploitation of this vulnerability occurs when ImageMagick attempts to process image data containing an invalid magnify method parameter. During the parsing phase, the software fails to properly validate the method value against expected parameters, leading to an out-of-bounds memory read operation. This type of flaw falls under CWE-125, which specifically addresses out-of-bounds read conditions in software implementations. The vulnerability is particularly concerning because it can be triggered through image file processing without requiring user interaction beyond file opening, making it suitable for automated exploitation in web-based scenarios.
From an operational perspective, this vulnerability presents significant risks to systems that process untrusted image files from external sources. Attackers could potentially leverage this flaw to extract sensitive information from memory locations adjacent to the heap buffer, including cryptographic keys, user credentials, or application data. The out-of-bounds read could also lead to denial of service conditions by causing application crashes or instability. This vulnerability aligns with ATT&CK technique T1203, which involves exploiting software vulnerabilities to gain access to system resources and potentially escalate privileges within affected environments.
The impact extends beyond simple information disclosure as the vulnerability can be exploited in various contexts where ImageMagick is integrated into larger applications or systems. Web applications that accept image uploads, content management systems, and file processing services all represent potential attack vectors for this flaw. Organizations using older versions of ImageMagick in production environments face elevated risk of compromise through supply chain attacks or direct exploitation of vulnerable endpoints. The vulnerability demonstrates the critical importance of keeping third-party libraries updated and maintaining robust input validation mechanisms within image processing workflows.
Mitigation strategies should prioritize immediate patching to ImageMagick version 7.1.2-19 or later, which includes proper bounds checking and input validation for the magnify operation. System administrators should implement strict file type validation and sanitize all image uploads before processing to prevent exploitation attempts. Network segmentation and application hardening measures can help limit the potential impact if exploitation occurs. Additionally, monitoring systems should be configured to detect unusual memory access patterns or application crashes that might indicate exploitation attempts. Organizations should also consider implementing sandboxing mechanisms for image processing operations and regularly audit their software dependencies to identify and remediate similar vulnerabilities across their infrastructure.