CVE-2026-28686

Received Received - Intake

Heap Buffer Overflow in ImageMagick PCL Encode Component

Publication date: 2026-03-10

Last updated on: 2026-03-12

Assigner: GitHub, Inc.

Description

ImageMagick is free and open-source software used for editing and manipulating digital images. Prior to versions 7.1.2-16 and 6.9.13-41, A heap-buffer-overflow vulnerability exists in the PCL encode due to an undersized output buffer allocation. This vulnerability is fixed in 7.1.2-16 and 6.9.13-41.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-03-10

Last Modified

2026-03-12

Generated

2026-07-06

AI Q&A

2026-03-10

EPSS Evaluated

2026-07-05

NVD

CVE-2026-28686

EUVD

EUVD-2026-10375

Affected Vendors & Products

Vendor	Product	Version / Range
imagemagick	imagemagick	to 6.9.13-41 (exc)
imagemagick	imagemagick	From 7.0.0-0 (inc) to 7.1.2-16 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-131	The product does not correctly calculate the size to be used when allocating a buffer, which could lead to a buffer overflow.
CWE-122	A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().

Attack-Flow Graph

Executive Summary

[{'type': 'paragraph', 'content': "CVE-2026-28686 is a moderate severity vulnerability in ImageMagick's PCL encoder component. It is a heap-buffer-overflow caused by an undersized output buffer allocation during encoding. This means that the software writes data beyond the allocated memory buffer, which can lead to memory corruption."}, {'type': 'paragraph', 'content': 'The vulnerability is due to incorrect calculation of the buffer size, classified under CWE-122 (Heap-based Buffer Overflow) and CWE-131 (Incorrect Calculation of Buffer Size). It affects versions of ImageMagick prior to 7.1.2-16 and 6.9.13-41.'}] [1]

Impact Analysis

This vulnerability allows a local attacker to cause memory corruption by overflowing a heap buffer. The impact includes potential disruption of system availability and integrity.

No confidentiality impact is expected.
Integrity impact is low, meaning some data or process integrity could be affected.
Availability impact is high, so the system or application could become unavailable or crash.

Compliance Impact

I don't know

Detection Guidance

This vulnerability affects ImageMagick versions prior to 7.1.2-16 and 6.9.13-41. To detect if your system is vulnerable, you should check the installed version of ImageMagick.

Run the command `magick -version` or `convert -version` to determine the installed ImageMagick version.
If the version is older than 7.1.2-16 or 6.9.13-41, your system is vulnerable to CVE-2026-28686.

Mitigation Strategies

To mitigate this vulnerability, you should upgrade ImageMagick to a patched version.

Update ImageMagick to version 7.1.2-16 or later, or 6.9.13-41 or later.
Avoid using vulnerable versions of ImageMagick, especially for processing untrusted PCL files.

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