Vulnerability Description
Improper validation of pod identifier uniqueness in aws-network-policy-agent in Amazon EKS Network Policy Agent before v1.4.0 might allow an authenticated remote user to bypass NetworkPolicy enforcement on co-located pods in other namespaces via crafted pod and namespace names that produce pod identifier collisions. To remediate this issue, users should upgrade to Amazon EKS Network Policy Agent 1.4.0 or later and Amazon VPC CNI Managed Add-on v1.22.4 or later (which includes Network Policy Agent v1.4.0).
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://github.com/aws/amazon-vpc-cni-k8s/releases/tag/v1.22.4
- https://github.com/aws/amazon-vpc-cni-k8s/security/advisories/GHSA-gjc7-c7mx-x8f
- https://github.com/aws/aws-network-policy-agent/releases/tag/v1.4.0
- https://github.com/aws/aws-network-policy-agent/security/advisories/GHSA-7xv7-8r
- https://staging.prod.website.marketing.aws.dev/security/security-bulletins/2026-
FAQ
What is CVE-2026-86831?
CVE-2026-86831 is a vulnerability with a CVSS score of 8.7 (HIGH). Improper validation of pod identifier uniqueness in aws-network-policy-agent in Amazon EKS Network Policy Agent before v1.4.0 might allow an authenticated remote user to bypass NetworkPolicy enforceme...
How severe is CVE-2026-86831?
CVE-2026-86831 has been rated HIGH with a CVSS base score of 8.7/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-86831?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.