CVE-2026-84721

Description

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.

Overview

State: PUBLISHED
Assigner (CNA): redhat
CVSS severity: MEDIUM
CVSS score: 6.4 / 10
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Effective score: 6.4 / 10 MEDIUM source: CNA overview
CWE(s): CWE-918
Reserved: 2026-09-02
Published: 2026-09-23 19:40 UTC
Last updated: 2026-09-23 19:40 UTC
Source: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/84xxx/CVE-2026-84721.json

NVD triage scoring NVD CVE 2.0

Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.

NVD published: 2026-09-23 20:17:18 UTC
NVD last modified: 2026-09-23 20:17:18 UTC
NVD CVSS v3.1: 6.4 / 10 MEDIUM source: secalert@redhat.com
NVD CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Exploitability subscore: 3.1 / 10
Impact subscore: 2.7 / 10

European Union Vulnerability Database ENISA EUVD

ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.

EUVD ID: EUVD-2026-85615
Assigner: redhat
Published: Sep 23, 2026, 7:40:38 PM
Updated: Sep 24, 2026, 6:09:45 AM
EUVD base score (CVSS 3.1): 6.4 / 10
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
EUVD-reported EPSS: 0.0000
Vendors: Red Hat
Products: Red Hat Ansible Automation Platform 2.7 (patch: 1789580684)
Aliases: GHSA-pm79-7whg-hpfr

ENISA description: 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.

EUVD references (3)

Affected products (3)

Vendor	Product	Versions	Platforms
Red Hat	Red Hat Ansible Automation Platform 2	—	—
Red Hat	Red Hat Ansible Automation Platform 2	—	—
Red Hat	Red Hat Ansible Automation Platform 2	—	—

Vendor references (2)

References embedded in the original CVE record by the assigning CNA.

https://access.redhat.com/security/cve/CVE-2026-84721 vdb-entryx_refsource_REDHAT
RHBZ#2527220 issue-trackingx_refsource_REDHAT

Web references (0)

DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.

No web references attached yet.

NVD-tagged references (2)

Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.

https://access.redhat.com/security/cve/CVE-2026-84721 secalert@redhat.com
https://bugzilla.redhat.com/show_bug.cgi?id=2527220 secalert@redhat.com

Remediations (10)

Security Updates - Red Hat Customer Portal

web:access.redhat.com

Products & tools Red Hat Documentation Find answers, get guidance, and learn how to use Red Hat products. Red Hat Ecosystem Catalog Find hardware, software, and cloud providers―and download container images―certified to perform with Red Hat technologies.

2026-09-24 11:49 UTC
CVE-2026-84721 - Automation-controller: automation-controller: email ...

web:cvefeed.io

The following list is the news that have been mention CVE-2026-84721 vulnerability anywhere in the article. Results are limited to the first 20 news articles due to potential performance issues. EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

2026-09-24 11:49 UTC
CVE-2026-84721 - Exploits & Severity - Feedly

web:feedly.com

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 ...

2026-09-24 11:49 UTC
Microsoft Patch Tracker (September 2026): Exploit-Ranked | Senserva

web:senserva.com

Every Microsoft security patch (KB) and the CVEs it fixes, with severity, CVSS, and CISA KEV status. Cross-linked to the CVE reference.

2026-09-24 11:49 UTC
SAP Security Patch Day - June 2026

web:support.sap.com

SAP security Patch Day Bulletin This post shares the information on security notes that remediate vulnerabilities discovered in SAP products. SAP strongly recommends that the customer visits the support portal and applies patches on priority to protect their SAP landscape. On 9th of June 2026 , SAP security patch day saw the release of 15 new security notes.

2026-09-24 11:49 UTC
What Is CVE Remediation in 2026? - aikido.dev

web:www.aikido.dev

CVE remediation is fixing known flaws in the software you run. Why upgrading often fails, what remediation actually involves, and how backporting fixes it.

2026-09-24 11:49 UTC
Oracle Critical Patch Update Advisory - April 2026

web:www.oracle.com

This Critical Patch Update contains 481 new security patches across the product families listed below. Please note that an MOS note summarizing the content of this Critical Patch Update and other Oracle Software Security Assurance activities is located at April 2026 Critical Patch Update: Executive Summary and Analysis.

2026-09-24 11:49 UTC
Oracle Critical Patch Update Advisory - July 2026

web:www.oracle.com

This Critical Patch Update contains 1448 new security patches across the product families listed below. Please note that a My Oracle Support (MOS) note summarizing the content of this Critical Patch Update and other Oracle Software Security Assurance activities is located at July 2026 Critical Patch Update: Executive Summary and Analysis.

2026-09-24 11:49 UTC
Patch Tuesday - August 2026 - Rapid7

web:www.rapid7.com

Microsoft is publishing 421 vulnerabilities on August 2026 Patch Tuesday, including 236 vulnerabilities in Windows. Rapid7 has disclosed the second in a two-part critical remote execution vulnerability chain in SharePoint.

2026-09-24 11:49 UTC
CVE-2026-84721: Red Hat Red Hat Ansible Automation Platform 2 ... - Rapid7

web:www.rapid7.com

CVE-2026-84721 : Red Hat Red Hat Ansible Automation Platform 2: A server-side request forgery flaw was found in the Ansible Automation Platform automation-controller email…. View severity, references, and remediation details from Rapid7.

2026-09-24 11:49 UTC

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Raw JSON

The full cvelistV5 record. Download as CVE-2026-84721.json.

{
  "containers": {
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    "dateReserved": "2026-09-02T01:36:54.923Z",
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}