Description
Incorrect behavior order in the Gateway API listener-rule generation in Amazon AWS Load Balancer Controller before 3.4.2 might allow an authenticated remote user to intercept, spoof, or deny another namespace's gRPC traffic on a shared Gateway via a crafted HTTPRoute resource.



To mitigate this issue, users should upgrade to version 3.4.2.
Published: 2026-07-14
Score: 5.8 Medium
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Tue, 14 Jul 2026 20:30:00 +0000

Type Values Removed Values Added
Description Incorrect behavior order in the Gateway API listener-rule generation in Amazon AWS Load Balancer Controller before 3.4.2 might allow an authenticated remote user to intercept, spoof, or deny another namespace's gRPC traffic on a shared Gateway via a crafted HTTPRoute resource. To mitigate this issue, users should upgrade to version 3.4.2.
Title Cross-namespace traffic interception via incorrect route precedence ordering in AWS Load Balancer Controller
First Time appeared Amazon
Amazon aws-load-balancer-controller
Weaknesses CWE-653
CPEs cpe:2.3:a:amazon:aws-load-balancer-controller:*:*:*:*:*:*:*:*
Vendors & Products Amazon
Amazon aws-load-balancer-controller
References
Metrics cvssV3_1

{'score': 8.5, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H'}

cvssV4_0

{'score': 5.8, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H'}

Subscriptions

Amazon Aws-load-balancer-controller
cve-icon MITRE

Status: PUBLISHED

Assigner: AMZN

Published:

Updated: 2026-07-14T20:19:23.721Z

Reserved: 2026-07-14T14:02:30.277Z

Link: CVE-2026-15738

cve-icon Vulnrichment

No data.

cve-icon NVD

No data.

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses