CVE-2026-15738
HighCVSS 8.5Exploitation Probability (EPSS)
Low risk29th percentile - higher than 29% of all known CVEs
Summary
A vulnerability in Amazon AWS Load Balancer Controller before version 3.4.2, caused by incorrect behavior order in Gateway API listener-rule generation, allows an authenticated remote user to intercept, spoof, or deny another namespace's gRPC traffic on a shared Gateway via a crafted HTTPRoute resource.
Risk Assessment
The organization faces a breach of namespace isolation, potentially leading to data leakage, man-in-the-middle attacks on gRPC traffic, or denial of service for other applications.
Recommendation
Immediately upgrade Amazon AWS Load Balancer Controller to version 3.4.2 or later to remediate the vulnerability.
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Original NVD description (English source)
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.