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Fencer Vulns
low 3.7

CVE-2026-56365 json

ImageMagick - Memory Leak in PNG Encoder via MNG Image Writing

published 2026-04-14 6 mo ago modified 2026-10-29 10 d ago also EUVD-2026-40448 , GHSA-hq73-7c65-p9cq , GHSA-x928-4434-crqj , JLSEC-2026-1046

cvss
3.7
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 21%
public exploits
0
none known

Summary

ImageMagick before 7.1.2-19 contains a memory leak vulnerability in the PNG encoder when writing MNG images. Attackers can trigger the encoder failure condition to exhaust memory resources and cause denial of service.

Patch / fix

  • nuget Magick.NET-Q16-AnyCPU 14.12.0
  • nuget Magick.NET-Q16-HDRI-AnyCPU 14.12.0
  • nuget Magick.NET-Q16-HDRI-OpenMP-arm64 14.12.0
  • nuget Magick.NET-Q16-HDRI-arm64 14.12.0
  • nuget Magick.NET-Q16-HDRI-x64 14.12.0
  • nuget Magick.NET-Q16-HDRI-x86 14.12.0
  • nuget Magick.NET-Q16-OpenMP-arm64 14.12.0
  • nuget Magick.NET-Q16-OpenMP-x64 14.12.0
  • nuget Magick.NET-Q16-arm64 14.12.0
  • nuget Magick.NET-Q16-x64 14.12.0
  • nuget Magick.NET-Q16-x86 14.12.0
  • nuget Magick.NET-Q16-HDRI-OpenMP-x64 14.12.0
  • nuget Magick.NET-Q8-AnyCPU 14.12.0
  • nuget Magick.NET-Q8-OpenMP-arm64 14.12.0
  • nuget Magick.NET-Q8-OpenMP-x64 14.12.0
  • nuget Magick.NET-Q8-arm64 14.12.0
  • nuget Magick.NET-Q8-x64 14.12.0
  • nuget Magick.NET-Q8-x86 14.12.0
  • julia ImageMagick_jll 7.1.2023+0
  • ImageMagick ImageMagick 6.9.13-44, 7.1.2-19
  • imagemagick Debian 12 8:6.9.11.60+dfsg-1.6+deb12u12
  • imagemagick Debian 13 8:7.1.1.43+dfsg1-1+deb13u11
  • imagemagick Debian 14 8:7.1.2.19+dfsg1-1

debian advisories DEBIAN-CVE-2026-56365

  • ImageMagick SLES for SAP applications 16.0, SLES 16.0 7.1.2.0-160000.14.1
  • ImageMagick SLES for SAP 15 SP6, SLES for SAP 15 SP5, SLES for SAP 15 SP4 +8 more 7.1.0.9-150400.6.96.1
  • 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 LTSS Extended Security 12 SP5, SLES 12 SP5-LTSS 6.8.8.1-71.259.1
  • ImageMagick SLES for SAP 15 SP6, SLES 15 SP6-LTSS 7.1.1.21-150600.3.73.1

suse advisories SUSE-SU-2026:23312-1SUSE-SU-2026:3053-1SUSE-SU-2026:3024-1SUSE-SU-2026:3023-1SUSE-SU-2026:2877-1

  • ImageMagick openSUSE Leap 16.0 7.1.2.0-160000.14.1
  • ImageMagick openSUSE Tumbleweed 7.1.2.27-1.1

opensuse advisories openSUSE-SU-2026:21635-1openSUSE-SU-2026:11228-1

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-2026-56365 updated cvss 3.7

Magick.NET-Q16-AnyCPU: Magick.NET-Q16-HDRI-AnyCPU: Magick.NET-Q16-HDRI-OpenMP-arm64: Magick.NET-Q16-HDRI-arm64: Magick.NET-Q16-HDRI-x64: Magick.NET-Q16-HDRI-x86: Magick.NET-Q16-OpenMP-arm64: Magick.NE

  • Red Hat Enterprise Linux 6 ImageMagick, ImageMagick-c++, ImageMagick-perl Red Hat Enterprise Linux 7 ImageMagick, ImageMagick-c++, ImageMagick-perl
    affected: workaround, no fix planned “To mitigate this use system controls (such as ulimit or container memory limits) to strictly cap the memory available to the ImageMagick process. This prevents a leak from crashing the wider system.”

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

Exploit prediction

0.28% chance of exploitation in the next 30 days, higher than 21% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 4.0 6.3 CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
CNA 3.1 3.7 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
GitHub 3.1 3.7 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
CNA 4.0 6.3 CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
NVD 3.1 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
OSV 3.1 5.3 CVSS:3.1/AV:N/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
<14.12.0
14.12.0
nuget Magick.NET-Q16-HDRI-AnyCPU
<14.12.0
14.12.0
nuget Magick.NET-Q16-HDRI-OpenMP-arm64
<14.12.0
14.12.0
nuget Magick.NET-Q16-HDRI-arm64
<14.12.0
14.12.0
nuget Magick.NET-Q16-HDRI-x64
<14.12.0
14.12.0
nuget Magick.NET-Q16-HDRI-x86
<14.12.0
14.12.0
nuget Magick.NET-Q16-OpenMP-arm64
<14.12.0
14.12.0
nuget Magick.NET-Q16-OpenMP-x64
<14.12.0
14.12.0
nuget Magick.NET-Q16-arm64
<14.12.0
14.12.0
nuget Magick.NET-Q16-x64
<14.12.0
14.12.0
nuget Magick.NET-Q16-x86
<14.12.0
14.12.0
nuget Magick.NET-Q16-HDRI-OpenMP-x64
<14.12.0
14.12.0
nuget Magick.NET-Q8-AnyCPU
<14.12.0
14.12.0
nuget Magick.NET-Q8-OpenMP-arm64
<14.12.0
14.12.0
nuget Magick.NET-Q8-OpenMP-x64
<14.12.0
14.12.0
nuget Magick.NET-Q8-arm64
<14.12.0
14.12.0
nuget Magick.NET-Q8-x64
<14.12.0
14.12.0
nuget Magick.NET-Q8-x86
<14.12.0
14.12.0
julia ImageMagick_jll
<7.1.2023+0
7.1.2023+0

Affected products

  • ImageMagick ImageMagick

Classification

Weakness
  • CWE-401 Missing Release of Memory after Effective Lifetime

References

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.