---
id: "CVE-2026-116151"
kind: "vulnerability"
aliases: ["CVE-2026-116151"]
title: "ImageMagick: crafted images leak memory in the JNG encoder"
severity: "medium"
cvss: 6.3
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["image-processing", "imagemagick", "package", "self-hosted"]
not_affected_if: ["jng-encoding-unused", "no-untrusted-input"]
published_at: "2026-10-25T14:16:53+00:00"
first_seen_at: "2026-10-25T14:41:22+00:00"
updated_at: "2026-10-25T14:42:50+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-116151", "first_seen_at": "2026-10-25T14:41:22+00:00"}]
---

# ImageMagick: crafted images leak memory in the JNG encoder

ImageMagick's JNG encoder fails to free allocated memory when it processes a crafted image. An attacker who supplies such images can exhaust memory and cause a limited denial of service.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Run `magick -version` (or `convert -version`) and compare the reported version with the fixed releases below.
- Check whether the service converts user-supplied images to JNG format.

## Fix

- Upgrade ImageMagick 6 to `6.9.13-58` or later.
- Upgrade ImageMagick 7 to `7.1.2-33` or later.

## Timeline

- 2026-10-25T14:41:22+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-116151

## From the sources

ImageMagick before 6.9.13-58 and 7.x before 7.1.2-33 contains a memory leak in the JNG encoder that fails to release allocated memory when processing a crafted image. Attackers can supply crafted images that are encoded to JNG to leak memory, potentially causing resource exhaustion and a limited denial of service.

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_