CVE-2026-15738
HIGHCross-namespace traffic interception via incorrect route precedence ordering in AWS Load Balancer Controller
Title source: cnaDescription
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.
References (2)
Core 2
Core References
Release Notes release-notes
https://github.com/kubernetes-sigs/aws-load-balancer-controller/releases/tag/v3.4.2
Vendor Advisory vendor-advisory
https://aws.amazon.com/security/security-bulletins/2026-055-aws/
Scores
CVSS v3
8.5
EPSS
0.0037
EPSS Percentile
30.0%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
total
Details
CWE
CWE-653
Status
published
Products (1)
Amazon/aws-load-balancer-controller
< 3.4.2
Published
Jul 14, 2026
Tracked Since
Jul 15, 2026