CVE-2026-18141
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N
Summary
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 Software
| Vendor | Product | Version Range | Status |
|---|
Weaknesses
- CWE-295: Improper Certificate Validation
Workarounds
Restrict network access to the EDA event stream endpoints at the firewall or load balancer level. Ensure that only trusted sources are permitted to reach the event stream ports. Additionally, monitor EDA event logs for any unexpected events originating from unverified sources.
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: none
- Automatable: yes
- Technical Impact: partial
References
- https://access.redhat.com/security/cve/CVE-2026-18141
- https://bugzilla.redhat.com/show_bug.cgi?id=2508155
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