External risk intelligence

Drupal Ffmpeg Image Toolkit OS Command Injection Vulnerability

CVE advisorySeverity: CRITICAL (CVSS 9.8)

CVE-2026-114523

The vulnerability affects a Drupal module, which is a content management system component. Drupal sites are frequently deployed as public-facing web applications. Because this module processes image files, it is commonly accessible via web interfaces that accept user-uploaded media, making the vulnerable functionality reachable from the internet in standard web deployment scenarios.

OS Command Injection

Halo Surface Signal: 4 out of 5 — likely to be public-facing.

External exposure likelihood

Horizon Alert

Summary of the vulnerability and why it matters

A critical vulnerability has been identified in a Drupal module that handles image processing, potentially allowing attackers to execute commands on affected systems without authentication. This exposure stems from how the module processes special elements within operating system commands, creating an opportunity for malicious code injection. The main concern is confirming relevance and exposure due to the module's potential to process user-supplied data.

Attackers can run commands on systems.
Affects image processing in Drupal modules.
Confirm relevance and exposure.

Attack Path

How an attacker could exploit the issue

An attacker could exploit this vulnerability by sending specially crafted input to a Drupal site that uses the Ffmpeg Image Toolkit. This toolkit, when processing image files, may not properly sanitize specific characters, allowing an attacker to inject and execute arbitrary operating system commands on the server. If successful, this could lead to a complete compromise of the affected server.

Accessible via the internet.
Triggered by image uploads.
Leads to server compromise.

Live Threat

Current exploitation, exposure, and threat context

When supported by the advisory, an improper neutralization of special elements used in an OS command vulnerability in the Drupal Ffmpeg Image Toolkit could allow an unauthenticated attacker to inject and execute arbitrary operating system commands. This could lead to compromise of the server hosting the Drupal instance, impacting the integrity and availability of the system.

OS command execution on the server.
Via specially crafted image processing requests.
Potential for full server compromise.

Operational Fix

Recommended remediation, mitigation, and detection steps

This critical vulnerability in the Drupal Ffmpeg Image Toolkit requires immediate attention from teams responsible for Drupal sites and their installed modules. The first step is to identify all instances of this toolkit, determine their network exposure and business criticality, and then locate the accountable application or platform owner to plan remediation, which may involve vendor coordination or temporary risk reduction.

Module owners, platform teams, or application owners.
Verify Ffmpeg Image Toolkit exposure and criticality.
Plan remediation or vendor coordination.

Supplementary metadata

CVSS vector

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Frequently asked questions

What is the Drupal Ffmpeg Image Toolkit?

The Ffmpeg Image Toolkit is a contributed module for the Drupal content management system. It provides functionality for Drupal sites to process, manipulate, or transcode video and image files using the FFmpeg utility. Developers integrate it when their web application needs to automatically handle media uploads, such as generating thumbnails or converting formats directly on the server.

What does OS Command Injection mean for CVE-2026-114523?

This vulnerability is classified as CWE-78: Improper Neutralization of Special Elements used in an OS Command. It means the module fails to properly scrub input before passing it to the server's operating system. Because the toolkit takes user-provided data and uses it to construct system-level instructions, an attacker can insert their own malicious commands, forcing the server to execute unintended actions with the same permissions as the web application.

How is this command injection vulnerability triggered?

An attacker triggers this by submitting specially crafted input—such as a manipulated image file—that the Ffmpeg Image Toolkit then processes. The vulnerability requires the software to pass this malicious data to a system shell. It is not triggered by simply visiting a page; it specifically requires the interaction of the toolkit's processing functions with untrusted, maliciously formatted input designed to break out of the intended command structure.

Is my Drupal site at risk?

According to Halo Surface Signal, this vulnerability is considered highly relevant because the toolkit is typically used in public-facing web applications. Since Drupal sites often accept user-uploaded media through web interfaces, the vulnerable image processing features are frequently exposed to the internet. If your site allows users to upload or process images through this specific module, it is likely reachable by an attacker.

When should I prioritize fixing this vulnerability?

Given its critical severity, you should prioritize this immediately. Your first step is to inventory your Drupal environments to confirm if the Ffmpeg Image Toolkit is installed and active. Once identified, work with your application owners to evaluate the module's necessity. If the feature is required, coordinate with your team to apply official patches or updates provided by the Drupal project to secure the environment.

References

www.drupal.org/sa-contrib-2026-220

Written by Nicholas Merritt

Nicholas Merritt is VP of Security Solutions at Halo Security. With more than 25 years across application security, vulnerability prioritization, and offensive security, he helps teams translate threat data into practical exposure validation and remediation focus. He authors Halo Threat Intelligence CVE advisories using Halo Surface Signal and H/A/L/O context to prioritize internet-facing risk.