CVE-2026-42146 — CImg Library is a C++ library for image processing. Prior

title: Potential CImg Library Out-of-Memory via Crafted BMP - CVE-2026-42146
id: scw-2026-05-04-ai-1
status: experimental
level: medium
description: |
  Detects processes like CImg.exe or ImageMagick.exe (which may use CImg) being launched with a .bmp file, potentially indicating an attempt to exploit CVE-2026-42146 by loading a crafted BMP file that triggers an out-of-memory condition. This rule focuses on the execution path where a user might be tricked into opening such a file.
author: SCW Feed Engine (AI-generated)
date: 2026-05-04
references:
  - https://shimiscyberworld.com/posts/nvd-CVE-2026-42146/
tags:
  - attack.execution
  - attack.t1204.002
logsource:
    category: process_creation
detection:
  selection:
      Image|endswith:
          - 'CImg.exe'
          - 'ImageMagick.exe'
      ParentImage|contains:
          - 'explorer.exe'
      CommandLine|contains:
          - '.bmp'
  selection_criteria:
      condition: selection
      condition: selection_criteria
falsepositives:
  - Legitimate administrative activity

Source: Shimi's Cyber World · License & reuse