External risk intelligence

Drupal Plotly.js Graphing Object Injection Vulnerability

CVE advisorySeverity: HIGH (CVSS 8.1)

CVE-2026-55810

The vulnerability affects a module within Drupal, a widely used content management system. Drupal sites are commonly deployed as internet-facing web applications, making components and modules integrated into these sites frequently reachable from the public internet.

Plotly Js Graphing

before 3.0.2

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 vulnerability has been identified in the Drupal Plotly.js Graphing module that could allow an attacker to inject objects into the system. This could potentially lead to significant compromise of confidentiality, integrity, and availability. Given the wide use of Drupal, confirming if this module is in use and exposed is prudent.

Module allows object injection.
Affects Drupal Plotly.js Graphing module.
Confirm relevance and exposure.

Attack Path

How an attacker could exploit the issue

An unauthenticated attacker could exploit this vulnerability by sending a specially crafted request to a Drupal site using the Plotly.js Graphing module. This could allow the attacker to inject and execute arbitrary code, potentially leading to a complete compromise of the affected system.

No authentication required to attack.
Malicious input sent to graphing module.
Full system compromise possible.

Live Threat

Current exploitation, exposure, and threat context

This vulnerability could allow an attacker to inject malicious objects into the Plotly.js Graphing module within Drupal. This could potentially impact the integrity and availability of the graphing service, and when supported by the advisory, may lead to unauthorized modification of system data by affecting the attributes of dynamically determined objects.

System data integrity and availability.
Malicious object injection via network.
Compromise of graphing service integrity.

Operational Fix

Recommended remediation, mitigation, and detection steps

This critical vulnerability in the Drupal Plotly.js Graphing module requires immediate attention from teams responsible for Drupal site administration and security. The first practical step is to inventory all Drupal instances, identify which ones use the affected Plotly.js Graphing module, and confirm their exposure and business criticality. Once these are understood, accountable owners can be identified, and remediation can be planned based on risk.

Drupal application and security teams own this issue.
Verify Plotly.js Graphing module usage and exposure.
Plan targeted remediation or mitigation.

Supplementary metadata

CVSS vector

Validate whether this threat affects your internet-facing exposure.

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Frequently asked questions

What is the Drupal Plotly.js Graphing module?

This module is a component used within the Drupal content management system to render interactive charts and data visualizations. It bridges Drupal with the Plotly.js JavaScript library, allowing site administrators to display complex data sets directly on their web pages. It is commonly utilized by developers to create dynamic reporting dashboards or analytical content for site visitors.

What does Object Injection mean for CVE-2026-55810?

This vulnerability is classified as CWE-915, which relates to Improperly Controlled Modification of Dynamically-Determined Object Attributes. In plain terms, it means the software does not properly sanitize data, allowing an attacker to insert their own data into the application's internal memory structures. This can trick the software into changing its own behavior, potentially executing unauthorized code or modifying sensitive system data.

How can an attacker trigger this vulnerability?

An attacker can trigger this issue by sending a specially crafted web request directly to the graphing module. The vulnerability does not require the attacker to have an existing account or password, as the flaw resides in how the module processes incoming data. Simply visiting the site as a regular user does not trigger the bug; the attacker must intentionally send structured, malicious input designed to exploit the object attribute modification.

Do I need to worry if my site is not on the internet?

Halo Surface Signal identifies this as an external threat, meaning internet-facing sites are at higher risk because they are reachable by anyone online. If your Drupal site is restricted to a private, internal network, the immediate threat is lower but not nonexistent, as anyone with access to that internal network could still reach the module. You should prioritize sites that are publicly accessible.

How should I respond to this threat?

Your first step is to inventory your Drupal environment to confirm if the Plotly.js Graphing module is installed. Check your site configurations to identify which instances rely on this specific module for data visualization. Once identified, evaluate the criticality of those sites and prepare to apply patches or disable the module if a fix is available, ensuring your team has a clear plan to protect your data integrity.

References

www.drupal.org/sa-contrib-2026-050

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.