CVE-2026-56361: ImageMagick - Heap Buffer Overflow via Off-by-One in Morphology Processing

Published Jun 30, 2026
·
Updated

ImageMagick before 7.1.2-19 contains an off-by-one error in morphology validation allowing out-of-bounds heap buffer reads. Attackers can trigger heap buffer overflow by providing incorrect morphology parameters causing single pixel memory access violations.

Affected Software

7 affected componentsFixes available
ImageMagick ImageMagick<7.1.2-19
ImageMagick ImageMagick<6.9.13-44
ImageMagick ImageMagick>=7.0.0-0<7.1.2-19
debian/imagemagick<8:6.9.11.60+dfsg-1.6+deb12u12
8:6.9.11.60+dfsg-1.6+deb12u12
debian/imagemagick<8:7.1.1.43+dfsg1-1+deb13u11
8:7.1.1.43+dfsg1-1+deb13u11
debian/imagemagick<8:7.1.2.19+dfsg1-1
8:7.1.2.19+dfsg1-1
debian/imagemagick<=8:6.9.11.60+dfsg-1.6+deb12u11
8:6.9.11.60+dfsg-1.6+deb12u158:7.1.1.43+dfsg1-1+deb13u128:7.1.1.43+dfsg1-1+deb13u148:7.1.2.34+dfsg1-18:7.1.2.35+dfsg1-2

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade debian/imagemagick to a version that resolves this vulnerability.

    Fixed in 8:6.9.11.60+dfsg-1.6+deb12u12
  2. Upgrade

    Upgrade debian/imagemagick to a version that resolves this vulnerability.

    Fixed in 8:7.1.1.43+dfsg1-1+deb13u11
  3. Upgrade

    Upgrade debian/imagemagick to a version that resolves this vulnerability.

    Fixed in 8:7.1.2.19+dfsg1-1
  4. Upgrade

    Upgrade debian/imagemagick to a version that resolves this vulnerability.

    Fixed in 8:6.9.11.60+dfsg-1.6+deb12u15Fixed in 8:7.1.1.43+dfsg1-1+deb13u12Fixed in 8:7.1.1.43+dfsg1-1+deb13u14Fixed in 8:7.1.2.34+dfsg1-1Fixed in 8:7.1.2.35+dfsg1-2
  5. Upgrade

    Upgrade ImageMagick to a version that resolves this vulnerability.

    Fixed in 7.1.2-19

Event History

Jun 30, 2026
CVE Published
via MITRE·10:08 PM
Data Sourced
via MITRE·10:08 PM
DescriptionSeverityWeakness
Data Sourced
via NVD·11:17 PM
DescriptionSeverityWeaknessAffected Software
Oct 30, 2026
Data Sourced
via OSV·09:49 AM
Affected Software

Parent advisories

This vulnerability appears in the following advisories.

Peer vulnerabilities

Found alongside the following vulnerabilities.

Frequently Asked Questions

1

What is the severity of CVE-2026-56361?

The severity of CVE-2026-56361 is medium with a CVSS score of 4.8.

2

How can I fix CVE-2026-56361?

To fix CVE-2026-56361, update ImageMagick to version 7.1.2-19 or later.

3

What type of vulnerability is CVE-2026-56361?

CVE-2026-56361 is a buffer overflow vulnerability caused by an off-by-one error in morphology processing.

4

What are the potential impacts of CVE-2026-56361?

The potential impacts of CVE-2026-56361 include out-of-bounds heap buffer reads and possible denial of service.

5

Who is affected by CVE-2026-56361?

Users of ImageMagick versions prior to 7.1.2-19 are affected by CVE-2026-56361.

Company

Resources

Contact

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