CVE-2026-12382

Aap-gateway: missing requestheaderstoremove allows mtls bypass via subject header spoofing

Published Jul 15, 2026 CVSS 3.1 · 8.2 High EPSS < 1% KEV · Not listed
Description
A flaw was found in the AAP Gateway Envoy proxy configuration. The non-mTLS route to EDA event streams does not remove the Subject HTTP header from client requests, despite the source code defining requestHeadersToRemove for this header. An unauthenticated remote attacker can inject a spoofed Subject header matching a legitimate client certificate DN to bypass mTLS authentication and inject arbitrary events into protected EDA event streams.

Remediation

Vendor Workaround

The following practices would help for avoiding exposure and mitigate this flaw: - Restrict network access to the non-mTLS EDA event stream route (/eda-event-streams/) at the firewall or load balancer level, allowing only trusted internal sources. - If mTLS-protected event streams are in use, ensure that only the /mtls/eda-event-streams/ route is accessible from untrusted networks. - Monitor EDA event stream activity for unexpected events_received counter increases that may indicate unauthorized event injection. - Review Envoy proxy logs for requests to the non-mTLS event stream route from unexpected source IPs.

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
CPEs cpe:/a:redhat:ansible_automation_platform:2.7::el9
References
Type Values Removed Values Added
CPEs cpe:/a:redhat:ansible_automation_platform:2.5::el8
cpe:/a:redhat:ansible_automation_platform:2.5::el9
cpe:/a:redhat:ansible_automation_platform_developer:2.5::el8
cpe:/a:redhat:ansible_automation_platform_developer:2.5::el9
cpe:/a:redhat:ansible_automation_platform_inside:2.5::el8
cpe:/a:redhat:ansible_automation_platform_inside:2.5::el9
References
Type Values Removed Values Added
CPEs cpe:/a:redhat:ansible_automation_platform:2
References
Type Values Removed Values Added
First Time appeared Redhat ansible Automation Platform Developer
Redhat ansible Automation Platform Inside
CPEs cpe:/a:redhat:ansible_automation_platform:2.6::el10
cpe:/a:redhat:ansible_automation_platform:2.6::el9
cpe:/a:redhat:ansible_automation_platform_developer:2.6::el10
cpe:/a:redhat:ansible_automation_platform_developer:2.6::el9
cpe:/a:redhat:ansible_automation_platform_inside:2.6::el9
Vendors & Products Redhat ansible Automation Platform Developer
Redhat ansible Automation Platform Inside
References
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description A flaw was found in the AAP Gateway Envoy proxy configuration. The non-mTLS route to EDA event streams does not remove the Subject HTTP header from client requests, despite the source code defining requestHeadersToRemove for this header. An unauthenticated remote attacker can inject a spoofed Subject header matching a legitimate client certificate DN to bypass mTLS authentication and inject arbitrary events into protected EDA event streams.
Title Aap-gateway: missing requestheaderstoremove allows mtls bypass via subject header spoofing
First Time appeared Redhat
Redhat ansible Automation Platform
Weaknesses CWE-290
CPEs cpe:/a:redhat:ansible_automation_platform:2
Vendors & Products Redhat
Redhat ansible Automation Platform
References
Metrics cvssV3_1

{'score': 8.2, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
redhat
Published
Updated
Aug 12, 2026, 5:34 PM
Reserved
Jun 16, 2026, 10:07 AM
Status
Awaiting Analysis
Published
Jul 15, 2026, 6:16 PM
Modified
Aug 12, 2026, 6:17 PM
Severity
Important
Public date
Jul 15, 2026, 5:12 PM