---
id: CVE-2026-56365
title: ImageMagick - Memory Leak in PNG Encoder via MNG Image Writing
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.
severity: low
cvss: 3.7
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L'
cvssSource: cna
cwe:
  - CWE-401
vendor: ImageMagick
product: ImageMagick
affected:
  - ImageMagick >= 7.0.0 < 7.1.2-19
  - ImageMagick < 6.9.13-44
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-07-01T13:16:02.735899Z'
published: '2026-06-30'
updated: '2026-10-29'
sourceUpdated: '2026-10-29T21:15:51.188Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-56365'
references:
  - url: >-
      https://github.com/ImageMagick/ImageMagick/security/advisories/GHSA-x928-4434-crqj
    label: GitHub Security Advisory (GHSA-x928-4434-crqj)
  - url: >-
      https://www.vulncheck.com/advisories/imagemagick-memory-leak-in-png-encoder-via-mng-image-writing
    label: >-
      VulnCheck Advisory: ImageMagick - Memory Leak in PNG Encoder via MNG Image
      Writing
tags:
  - cve.org
epss: 0.00284
epssPercentile: 0.21091
ingestedAt: '2026-11-03T08:39:35.559Z'
---

## Overview

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.

## Affected

- `ImageMagick >= 7.0.0 < 7.1.2-19`
- `ImageMagick < 6.9.13-44`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.