ImageMagick: Heap Buffer Over-Write of a single byte in the JP2 encoder

published 2026-05-18 5 mo ago modified 2026-07-30 3 mo ago also EUVD-2026-36173 , GHSA-533m-3wf6-c33v , JLSEC-2026-1017

cvss: 4.0; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.1%; EPSS 0.1% chance of exploitation in 30 days, percentile 1%
public exploits: 0; none known

ImageMagick is free and open-source software used for editing and manipulating digital images. Prior to versions 6.9.13-48 and 7.1.2-23, an incorrect check in the JP2 will result in an heap buffer over-write of a single byte when specifying certain options. This issue has been patched in versions 6.9.13-48 and 7.1.2-23.

Patch / fix

fixed in 20 distros 4

nuget Magick.NET-Q16-AnyCPU 14.13.1
nuget Magick.NET-Q16-HDRI-AnyCPU 14.13.1
nuget Magick.NET-Q16-HDRI-OpenMP-arm64 14.13.1
nuget Magick.NET-Q16-HDRI-OpenMP-x64 14.13.1
nuget Magick.NET-Q16-HDRI-arm64 14.13.1
nuget Magick.NET-Q16-HDRI-x64 14.13.1
nuget Magick.NET-Q16-HDRI-x86 14.13.1
nuget Magick.NET-Q16-OpenMP-arm64 14.13.1
nuget Magick.NET-Q16-OpenMP-x64 14.13.1
nuget Magick.NET-Q16-arm64 14.13.1
nuget Magick.NET-Q16-x64 14.13.1
nuget Magick.NET-Q16-x86 14.13.1
nuget Magick.NET-Q8-AnyCPU 14.13.1
nuget Magick.NET-Q8-OpenMP-arm64 14.13.1
nuget Magick.NET-Q8-OpenMP-x64 14.13.1
nuget Magick.NET-Q8-arm64 14.13.1
nuget Magick.NET-Q8-x64 14.13.1
nuget Magick.NET-Q8-x86 14.13.1
julia ImageMagick_jll 7.1.2028+0
imagemagick imagemagick 6.9.13-48, 7.1.2-23

debian suse opensuse alpine

imagemagick Debian 12 8:6.9.11.60+dfsg-1.6+deb12u10
imagemagick Debian 13 8:7.1.1.43+dfsg1-1+deb13u9
imagemagick Debian 14 8:7.1.2.23+dfsg1-1

debian advisories DEBIAN-CVE-2026-46559

ImageMagick SLE Module for Development Tools 15 SP7, SLE Module for Desktop Applications 15 SP7 7.1.1.43-150700.3.65.1
ImageMagick SLES for SAP applications 16.0, SLES 16.0 7.1.2.0-160000.10.1
ImageMagick SLES for SAP 15 SP6, SLES for SAP 15 SP5, SLES for SAP 15 SP4 +8 more 7.1.0.9-150400.6.87.1
ImageMagick SLES for SAP 15 SP6, SLES 15 SP6-LTSS 7.1.1.21-150600.3.73.1

suse advisories SUSE-SU-2026:3023-1 SUSE-SU-2026:2877-1 SUSE-SU-2026:22378-1 SUSE-SU-2026:2580-1

GraphicsMagick openSUSE Tumbleweed 1.3.49-1.1
ImageMagick openSUSE Leap 16.0 7.1.2.0-160000.10.1
ImageMagick openSUSE Tumbleweed 7.1.2.25-2.1

opensuse advisories openSUSE-SU-2026:12189-1 openSUSE-SU-2026:21071-1 openSUSE-SU-2026:11061-1

imagemagick Alpine 3.23 7.1.2.24-r0
imagemagick Alpine 3.24 7.1.2.23-r0

alpine advisories ALPINE-CVE-2026-46559

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-46559 updated 2026-11-05 cvss 6.2

ImageMagick: ImageMagick: Denial of service via heap buffer overwrite in JP2 processing

Red Hat Enterprise Linux 6 ImageMagick, ImageMagick-c++, ImageMagick-perl Red Hat Enterprise Linux 7 ImageMagick, ImageMagick-c++, ImageMagick-perl
affected: no fix planned “Out of support scope”

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 4 mo ago (2026-06-11)

Exploit prediction

0.12% chance of exploitation in the next 30 days, higher than 1% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	4.0	CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
GitHub	3.1	4.0	CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
OSV	3.1	4.0	CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Affected packages

ecosystem	package	affected	fixed in
nuget	Magick.NET-Q16-AnyCPU	<14.13.1	14.13.1
nuget	Magick.NET-Q16-HDRI-AnyCPU	<14.13.1	14.13.1
nuget	Magick.NET-Q16-HDRI-OpenMP-arm64	<14.13.1	14.13.1
nuget	Magick.NET-Q16-HDRI-OpenMP-x64	<14.13.1	14.13.1
nuget	Magick.NET-Q16-HDRI-arm64	<14.13.1	14.13.1
nuget	Magick.NET-Q16-HDRI-x64	<14.13.1	14.13.1
nuget	Magick.NET-Q16-HDRI-x86	<14.13.1	14.13.1
nuget	Magick.NET-Q16-OpenMP-arm64	<14.13.1	14.13.1
nuget	Magick.NET-Q16-OpenMP-x64	<14.13.1	14.13.1
nuget	Magick.NET-Q16-arm64	<14.13.1	14.13.1
nuget	Magick.NET-Q16-x64	<14.13.1	14.13.1
nuget	Magick.NET-Q16-x86	<14.13.1	14.13.1
nuget	Magick.NET-Q8-AnyCPU	<14.13.1	14.13.1
nuget	Magick.NET-Q8-OpenMP-arm64	<14.13.1	14.13.1
nuget	Magick.NET-Q8-OpenMP-x64	<14.13.1	14.13.1
nuget	Magick.NET-Q8-arm64	<14.13.1	14.13.1
nuget	Magick.NET-Q8-x64	<14.13.1	14.13.1
nuget	Magick.NET-Q8-x86	<14.13.1	14.13.1
julia	ImageMagick_jll	<7.1.2028+0	7.1.2028+0

Affected products

ImageMagick ImageMagick

Classification

Weakness

CWE-193 Off-by-one Error
CWE-787 Out-of-bounds Write

References

github.com /ImageMagick/ImageMagick/security/advisories/GHSA-533m-3wf6-c33v
web, vendor-advisory
nvd.nist.gov /vuln/detail/CVE-2026-46559
advisory, web
github.com /ImageMagick/ImageMagick
package
github.com /advisories/GHSA-533m-3wf6-c33v
web

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.

Summary