External risk intelligence

Drupal OpenAI Provider SSRF Vulnerability

CVE advisorySeverity: LOW (CVSS 3.3)

CVE-2026-13233

This vulnerability affects a Drupal module, which is typically deployed as part of an internet-facing web application. SSRF vulnerabilities in web modules are frequently reachable when the application processes external user-supplied data or interacts with web services, making it likely that the vulnerable functionality is exposed to the internet in standard deployments.

Server-Side Request Forgery

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 OpenAI integrations, specifically a Server-Side Request Forgery (SSRF) issue. This type of vulnerability allows an attacker to trick the server into making unintended requests to internal or external resources, potentially leading to unauthorized access to sensitive data or systems. Given the nature of SSRF flaws and the module's likely integration into web applications, it's important to understand its potential impact on your environment.

Attackers can trick servers into making harmful requests.
Module in web apps needs checking for this risk.
Confirm relevance and exposure to understand impact.

Attack Path

How an attacker could exploit the issue

An attacker could exploit this Server-Side Request Forgery vulnerability by sending a specially crafted request to a vulnerable Drupal website that uses the OpenAI Provider module. This could lead to unauthorized requests being made from the server to internal or external resources.

No authentication or user interaction needed.
Triggered by a crafted request to the module.
Leads to unauthorized server-side requests.

Live Threat

Current exploitation, exposure, and threat context

This Server-Side Request Forgery (SSRF) vulnerability in the Drupal OpenAI Provider could allow an unauthenticated attacker to make arbitrary requests on behalf of the server. This could potentially lead to unauthorized access to internal resources or sensitive information accessible by the server.

Server's network requests.
Maliciously crafted requests to the server.
Unauthorized access to internal resources.

Operational Fix

Recommended remediation, mitigation, and detection steps

This Server-Side Request Forgery vulnerability in the Drupal OpenAI Provider impacts systems that use this module. The first step is to identify all instances of the OpenAI Provider module within your Drupal environments. Subsequently, confirm which of these instances are externally accessible or process untrusted input, and then identify the specific application or platform owner responsible for each affected Drupal site to coordinate remediation.

Identify affected Drupal instances.
Verify external reachability and exposure.
Coordinate with application owners for remediation.

Supplementary metadata

CVSS vector

Validate whether this threat affects your internet-facing exposure.

Halo Threat Intelligence helps prioritize remediation with Halo Surface Signal and H/A/L/O context. Start exposure validation with a free external attack surface trial.

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Frequently asked questions

What is the Drupal OpenAI Provider module?

The Drupal OpenAI Provider is a specific extension designed to integrate OpenAI's artificial intelligence services into Drupal-based websites. It acts as a bridge, allowing developers to connect their site's infrastructure to OpenAI APIs to process content, generate responses, or automate tasks directly through the Drupal backend.

What does Server-Side Request Forgery mean for CVE-2026-13233?

This vulnerability is classified as CWE-918, or Server-Side Request Forgery (SSRF). In plain English, it means an attacker can manipulate the server into acting as a proxy. Instead of the server performing tasks for authorized users, it is tricked into sending requests to locations the attacker chooses, such as internal network systems or other private web services that are normally hidden from the public internet.

How is this SSRF vulnerability triggered?

An attacker triggers this flaw by sending a specifically formatted request to the Drupal site that utilizes the OpenAI Provider module. Because the vulnerability does not require authentication or user interaction, the attacker can initiate the malicious request independently. It is important to note that simply visiting a page is not the trigger; the request must be crafted to exploit the way the module handles input.

Is my site at risk if it uses this module?

Halo Surface Signal indicates that because this is a web module, it is often deployed on internet-facing applications. If your instance is reachable from the internet and handles user-supplied data, the likelihood that an attacker can reach the vulnerable code is high. You should assume that any server running this module on a public-facing Drupal site is potentially exposed to this unauthorized request activity.

How should I respond to this vulnerability?

Begin by auditing your Drupal environments to inventory every instance where the OpenAI Provider module is active. Once identified, work with the team members or owners responsible for those specific sites to assess their connectivity. Prioritize checking sites that are exposed to the internet or that process untrusted input, as these are the primary targets for an attacker attempting to leverage this SSRF weakness.

References

www.drupal.org/sa-contrib-2026-053

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.