CVE-2026-84721Automation-controller: automation-controller: email notification backend allows ssrf via user-controlled smtp host/port (internal port-scan oracle, smtp password exfil)

Official 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.

Affected products (as reported)

References

• RHSA-2026:71177 vendor-advisory, x_refsource_REDHAT
• https://access.redhat.com/security/cve/CVE-2026-84721 vdb-entry, x_refsource_REDHAT
• RHBZ#2527220 issue-tracking, x_refsource_REDHAT