CVE-2026-86831: Improper validation of pod identifier uniqueness in aws-network-policy-agent in Amazon EKS
Cybersecurity Classified by Officially
CVE-2026-86831: Improper validation of pod identifier uniqueness in aws-network-policy-agent in Amazon EKS
Bulletin ID: 2026-113-AWS
Scope: AWS
Content Type: Important (requires attention)
Publication Date: 09/16/2026 12:30 PM PDT
Network Policy Agent is an EKS Policy management feature. We identified CVE-2026-86831, a cross-namespace NetworkPolicy bypass in Amazon EKS Network Policy Agent (aws-network-policy-agent) before v1.4.0. Pod identifiers are constructed by concatenating the pod name and namespace with a hyphen delimiter, which is a legal character in both Kubernetes pod names and namespace names. This ambiguity can produce identical identifiers for pods across different namespaces, potentially allowing NetworkPolicy enforcement to be bypassed.
Customers can mitigate this issue by defining namespace names that do not contain hyphens (-). By avoiding hyphens in namespace names, the ambiguity in the identifier construction is eliminated, ensuring that pod identifiers remain unique across namespaces.
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- Amazon Web Services — imported from official source
- Official source
- https://aws.amazon.com/security/security-bulletins/feed/ RSS
- Imported
- September 16, 2026 20:30
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- 2 recorded
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