# CVE-2026-86831: Improper validation of pod identifier uniqueness in aws-network-policy-agent in Amazon EKS

> CVE-2026-86831: Improper validation of pod identifier uniqueness in aws-network-policy-agent in Amazon EKS. CVSS 8.7 (CVSS 3.1).

Canonical: https://rewindex.com/cve/CVE-2026-86831
Last updated: 2026-10-20T19:19:08Z

- Published: 2026-09-16 19:49 UTC · Updated: 2026-10-20 19:19 UTC · Assigner: AMZN
- CVSS: 8.7 (CVSS 3.1) · Severity: High · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N
- EPSS: 0.64%, 51th percentile (scored 2026-10-25)
- CISA KEV: no
- CWE: CWE-1289

## 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).

## Affected vendors and products

- AWS: amazon-vpc-cni-k8s
- AWS: aws-network-policy-agent

## Tracked companies

- [Amazon Web Services](https://rewindex.com/company/aws.md)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2026-86831)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2026-86831)
- [https://aws.amazon.com/security/security-bulletins/2026-113-aws/](https://aws.amazon.com/security/security-bulletins/2026-113-aws/)
- [https://github.com/aws/amazon-vpc-cni-k8s/releases/tag/v1.22.4](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-x8f3](https://github.com/aws/amazon-vpc-cni-k8s/security/advisories/GHSA-gjc7-c7mx-x8f3)
- [https://github.com/aws/aws-network-policy-agent/releases/tag/v1.4.0](https://github.com/aws/aws-network-policy-agent/releases/tag/v1.4.0)
- [https://github.com/aws/aws-network-policy-agent/security/advisories/GHSA-7xv7-8r3j-3j25](https://github.com/aws/aws-network-policy-agent/security/advisories/GHSA-7xv7-8r3j-3j25)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2026-86831 · Markdown: https://rewindex.com/cve/CVE-2026-86831.md · JSON: https://rewindex.com/api/v1/cves/CVE-2026-86831 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T03:13:36.515Z