---
id: CVE-2026-84721
title: >-
  A server-side request forgery flaw was found in the Ansible Automation
  Platform

  automation-controller email notification backend
summary: >-
  A server-side request forgery flaw was found in the Ansible Automation
  Platform

  automation-controller email notification backend. The email backend passes the
  user-supplied SMTP

  host and port from a notification template directly to the …
severity: medium
cvss: 6.4
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N'
cwe:
  - CWE-918
vendor: Red Hat
product: ansible-automation-platform-27/controller-rhel9
affected:
  - ansible-automation-platform-27/controller-rhel9 (all versions)
  - automation-controller (all versions)
patched:
  - ansible_automation_platform 2.7
published: '2026-09-23'
updated: '2026-09-24'
sourceUpdated: '2026-09-24T16:17:12.697'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-84721'
references:
  - url: 'https://access.redhat.com/errata/RHSA-2026:71177'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/security/cve/CVE-2026-84721'
    label: secalert@redhat.com
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2527220'
    label: secalert@redhat.com
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-84721.json
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-84721'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-84721'
tags:
  - nvd
  - cve.org
  - csaf
  - vex
  - red-hat
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-24T13:59:00.476952Z'
ingestedAt: '2026-09-23T20:32:10.753Z'
epss: 0.00171
epssPercentile: 0.05781
---

## Overview

A server-side request forgery flaw was found in the Ansible Automation Platform
automation-controller email notification backend. The email backend passes the user-supplied SMTP
host and port from a notification template directly to the SMTP client without validating that
the target is not an internal, loopback, link-local, or reserved address. An authenticated user
with organization notification-admin permission can create or modify an email notification
template pointing at an arbitrary internal address, trigger a test, and have the controller task
process open a raw TCP connection to that address. The resulting connection error is reflected
back through the notification record, providing a three-state internal port-scan oracle (open,
closed, filtered) over the control-plane's cluster network, including the in-cluster Kubernetes
API. When a shared organization template holds a stored SMTP password, redirecting the host can
also cause that credential to be transmitted to an attacker-controlled server.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Vendor advisories

- **RHSA-2026:71177** · Red Hat · fixed in: Red Hat Ansible Automation Platform 2.7 · released 2026-09-23 · [advisory](https://access.redhat.com/errata/RHSA-2026:71177)
- **Red Hat VEX** · Moderate · affected: Red Hat Ansible Automation Platform 2 · no fix planned: Red Hat Ansible Automation Platform 2 · updated 2026-09-24 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-84721.json)