CVE-2026-41247: elFinder: Command injection in resize background color parameter when using ImageMagick CLI

CVE-2026-41247 · Severity: critical · CVSS 9.8 · Published 2026-04-23

elFinder is an open-source file manager for web, written in JavaScript using jQuery UI. Prior to 2.1.67, elFinder contains a command injection vulnerability in the resize command. The bg (background color) parameter is accepted from user input and passed through image resize/rotate processing. In configurations that use the ImageMagick CLI backend, this value is incorporated into shell command strings without sufficient escaping. An attacker able to invoke the resize command with a crafted bg value may achieve arbitrary command execution as the web server process user. This vulnerability is fixed in 2.1.67.

Technologies: studio-42/elfinder (Packagist). Vendors: Packagist.

Quick answers

Is CVE-2026-41247 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-41247 being exploited in the wild.
How severe is CVE-2026-41247?
Critical severity, with a CVSS score of 9.8, published 23 April 2026.
Which products and versions are affected?
studio-42/elfinder (Packagist) ECOSYSTEM:introduced=0,fixed=2.1.67.
Is there a fix for CVE-2026-41247?
Yes. studio-42/elfinder (Packagist): upgrade to 2.1.67 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
Am I affected by CVE-2026-41247?
Check whether you run studio-42/elfinder (Packagist) or Std42 Elfinder at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • studio-42/elfinder (Packagist): upgrade to 2.1.67 or later
    composer require studio-42/elfinder:^2.1.67

Affected products

  • studio-42/elfinder (Packagist) ECOSYSTEM:introduced=0,fixed=2.1.67
  • Std42 Elfinder

Identifiers

  • CVE-2026-41247
  • GHSA-8q4h-8crm-5cvc

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