CVE-2026-12382 Red Hat CVE debrief

Who should care

Users of AAP Gateway Envoy proxy configuration, particularly those responsible for managing and securing the affected systems, should be aware of this vulnerability and take steps to mitigate it. This includes operators, platform administrators, vulnerability management teams, and security teams who need to assess the impact on their environments and implement necessary controls.

Technical summary

The CVE-2026-12382 vulnerability is caused by the non-mTLS route to EDA event streams not removing the Subject HTTP header from client requests. This allows an unauthenticated remote attacker to inject a spoofed Subject header matching a legitimate client certificate DN, bypassing mTLS authentication and injecting arbitrary events into protected EDA event streams. The vulnerability affects AAP Gateway Envoy proxy configuration and has a high CVSS score of 8.2, indicating a high severity vulnerability. Users should review their deployments and assess the potential impact on their systems.

Defensive priority

High priority due to the high CVSS score of 8.2 and the potential for arbitrary event injection. Users should prioritize reviewing and updating the AAP Gateway Envoy proxy configuration to ensure that the Subject HTTP header is properly removed from client requests. Implementing additional security measures, such as monitoring and incident response planning, is also recommended to mitigate the potential impact of this vulnerability. Users should verify that the vendor's remediation efforts are sufficient and implement compensating controls if necessary. Affected users should also review their exposure and plan for vendor-supported updates or mitigations through normal change control where exposure is confirmed. Compensating controls for exposed systems should be reviewed while remediation is scheduled and verified. Relevant monitoring, detection, and logs for exposed assets should be checked for extra review. Exceptions should be tracked, and remediated assets should be retested, with the item only closed after evidence is documented. Asset inventory and source tracking are also recommended to ensure thorough vulnerability management. Monitoring and compensating controls can help mitigate potential impacts while remediation efforts are in progress. Reviewing the official advisory or CVE record can help validate affected scope, severity, and vendor guidance. Confirming whether affected product deployments exist in managed environments and assigning an owner for follow-up is crucial for effective remediation. Tracking exceptions and retesting remediated assets are critical steps in ensuring that the vulnerability is fully addressed. Implementing a robust incident response plan can help minimize potential impacts on operations and data security. By taking these steps, users can enhance their defenses against this high-severity vulnerability and protect their systems from potential exploitation. Users should also consider the operational impact of this vulnerability on their systems and take steps to minimize potential disruptions. This may involve coordinating with vendors, implementing temporary mitigations, and developing contingency plans in case of an attack. A

Recommended defensive actions

• Review and update the AAP Gateway Envoy proxy configuration to ensure that the Subject HTTP header is properly removed from client requests.
• Implement additional security measures, such as monitoring and incident response planning, to mitigate the potential impact of this vulnerability.
• Verify that the vendor's remediation efforts are sufficient and implement compensating controls if necessary.
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.
• Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance.
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed.
• Track exceptions, retest remediated assets, and close the item only after evidence is documented.

Evidence notes

The CVE record was published on 2026-07-15T18:16:44.307Z and was last modified on 2026-07-16T09:16:16.433Z. The NVD entry is currently Awaiting Analysis. This information is based on the CVE.org and NVD sources. The vulnerability affects AAP Gateway Envoy proxy configuration. Users should verify their deployments and review vendor guidance.

Official resources