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Vulnerability · Published Jul 31, 2026 · Assigned by redhat

CVE-2026-18141Aap-gateway: aap-gateway: authentication bypass in event-driven ansible via forged http header

High 8.2

In plain English

A high-severity improper certificate validation in Red Hat Ansible Automation Platform 2 from Red Hat. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 37% of all known vulnerabilities).

Severity (CVSS 3.1)8.2High
Exploit odds (30 days)0.4%top 62.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

A flaw was found in aap-gateway, a component of Ansible Automation Platform's Event-Driven Ansible (EDA). An unauthenticated remote attacker can bypass mutual Transport Layer Security (mTLS) authentication for event streams. This is achieved by manipulating the event stream URL and forging the HTTP Subject header. The system also inadvertently discloses the expected certificate subject in error messages, which simplifies the attack. This vulnerability allows an attacker to inject arbitrary events into EDA, potentially triggering automated workflows.

Affected products (as reported)

VendorProductVersions
Red Hat Red Hat Ansible Automation Platform 2.6 for RHEL 9 see references
Red Hat Red Hat Ansible Automation Platform 2.6 see references
Red Hat Red Hat Ansible Automation Platform 2.7 see references
Red Hat Red Hat Ansible Automation Platform 2 see references

Weakness: CWE-295 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N

References