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CVE-2026-15738

Cross-namespace traffic interception via incorrect route precedence ordering in AWS Load Balancer Controller

Published: Jul 14, 2026Updated: Jul 15, 2026 Sources: CVE List NVDCWE-653
8.5HIGH
NVD MITRE
EPSS Score
0.4%
Top 70.0%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available
Self-Check
Not available

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:HPR:LUI:NS:CC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:HAttack Complexity
High
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:CScope
Changed
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
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Weaknesses

CWE-653

Affected Products

Amazon
commercial·US
aws-load-balancer-controllerSaaS
Cloud & SaaS / cloud-platform

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.
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References

https://aws.amazon.com/security/security-bulletins/2026-055-aws/
aws.amazon.com
https://github.com/kubernetes-sigs/aws-load-balancer-controller/releases/tag/v3.4.2
github.com

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