CVE-2026-15738
Published:July 14, 2026
Updated:August 06, 2026
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.
Affected Packages
https://github.com/kubernetes-sigs/aws-load-balancer-controller.git (GITHUB):
Affected version(s) >=v1.0.0 <v3.4.2Fix Suggestion:
Update to version v3.4.2github.com/kubernetes-sigs/aws-load-balancer-controller (GO):
Affected version(s) >=v3.0.0 <v3.4.2Fix Suggestion:
Update to version v3.4.2Related Resources (4)
Do you need more information?
Contact UsCVSS v4
Base Score:
5.8
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
PRESENT
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
NONE
Subsequent System Confidentiality
HIGH
Subsequent System Integrity
HIGH
Subsequent System Availability
HIGH
CVSS v3
Base Score:
8.5
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Weakness Type (CWE)
Improper Isolation or Compartmentalization
EPSS
Base Score:
0.37