External risk intelligence

Event-Driven Ansible Websocket API Missing Authorization Exposes Credentials.

CVE advisorySeverity: CRITICAL (CVSS 9.6)

CVE-2026-11807

The vulnerability exists in an Event-Driven Ansible websocket API. While these components are often deployed within internal orchestration or automation segments and generally protected by network controls, they are network-accessible services that could be reachable from the internet in certain complex or hybrid automation architectures.

Halo Surface Signal: 3 out of 5 — possibly public-facing.

External exposure likelihood

Horizon Alert

Summary of the vulnerability and why it matters

A vulnerability in the Event-Driven Ansible websocket API allows authenticated users to access sensitive credentials, such as OAuth tokens, vault passwords, and SSH keys. This issue stems from the API's failure to properly verify user permissions, potentially exposing critical security information to unauthorized individuals. The main concern is confirming relevance and exposure within your environment.

Unauthenticated access to critical credentials.
Potential for significant data exposure and misuse.
Confirm relevance and assess exposure to sensitive data.

Attack Path

How an attacker could exploit the issue

An attacker with authenticated access to the Event-Driven Ansible websocket API can exploit a missing authorization check. By sending a specially crafted message to the `/api/eda/ws/ansible-rulebook` endpoint, an attacker can trick the system into revealing sensitive credentials associated with any activation ID. This could lead to unauthorized access to resources protected by OAuth tokens, vault passwords, or SSH keys.

Authenticated user is required.
Worker messages are processed without permission checks.
Sensitive credentials may be exposed.

Live Threat

Current exploitation, exposure, and threat context

An authenticated user could potentially access plaintext credentials, such as OAuth tokens, vault passwords, and SSH keys, by sending a forged message to the Event-Driven Ansible websocket API. This is possible when the API's /api/eda/ws/ansible-rulebook endpoint processes Worker messages without properly verifying user permissions.

Plaintext credentials could be exposed.
Forged messages bypass permission checks.
Compromised credentials could grant unauthorized access.

Operational Fix

Recommended remediation, mitigation, and detection steps

Application owners and platform teams are most likely responsible for addressing this vulnerability in the Event-Driven Ansible (EDA) websocket API. The first practical step is to identify all EDA instances, confirm their network exposure, and determine which are business-critical to prioritize remediation efforts.

Application and platform teams own resolution.
Verify EDA instance exposure and criticality.
Plan remediation based on identified risk.

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 Event-Driven Ansible (EDA) and how is it used?

Event-Driven Ansible (EDA) is a platform component designed to automate IT operations by responding to system events in real time. It uses a rule-based engine to execute predefined actions automatically. Teams typically use EDA to manage complex infrastructure workflows, such as automatically restarting services or scaling resources, by integrating with various management tools through its websocket API.

What does CWE-862 mean for CVE-2026-11807?

CWE-862 refers to a missing authorization weakness. In the context of this CVE, it means the system performs an action—in this case, retrieving sensitive credentials—without confirming that the user is actually allowed to perform that specific request. Because the API fails to check permissions before processing the command, it treats any incoming message as valid.

How does an attacker trigger this vulnerability?

An attacker triggers this by sending a specially crafted message to the /api/eda/ws/ansible-rulebook endpoint. The system processes this as a legitimate Worker message despite the lack of authorization checks. Note that this cannot be triggered by unauthenticated individuals; it specifically requires the attacker to already have authenticated access to the system.

Do I need to worry about CVE-2026-11807 if my EDA is internal?

According to Halo Surface Signal, while EDA is often kept within internal automation segments, it remains a network-accessible service. You should evaluate if your architecture allows reachability from broader network segments. If your EDA instance is inadvertently exposed or reachable in a hybrid automation environment, it increases the risk of unauthorized credential access.

What are the first steps to respond to this threat?

Begin by identifying all running instances of Event-Driven Ansible within your environment. Once you have a complete inventory, assess their specific network placement to determine if they are reachable from non-essential segments. Finally, prioritize remediation for the instances that manage your most business-critical automated workflows to minimize potential impact.

References

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.