---
id: CVE-2026-86831
title: >-
  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
  namesp…
summary: >-
  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
  namesp…
severity: high
cvss: 8.7
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N'
cwe:
  - CWE-1289
vendor: AWS
product: aws-network-policy-agent
affected:
  - aws-network-policy-agent < 1.4.0
  - amazon-vpc-cni-k8s >= 1.14.0 < 1.22.4
published: '2026-09-16'
updated: '2026-09-17'
sourceUpdated: '2026-09-17T17:16:51.353'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-86831'
references:
  - url: 'https://github.com/aws/amazon-vpc-cni-k8s/releases/tag/v1.22.4'
    label: ff89ba41-3aa1-4d27-914a-91399e9639e5
  - url: >-
      https://github.com/aws/amazon-vpc-cni-k8s/security/advisories/GHSA-gjc7-c7mx-x8f3
    label: ff89ba41-3aa1-4d27-914a-91399e9639e5
  - url: 'https://github.com/aws/aws-network-policy-agent/releases/tag/v1.4.0'
    label: ff89ba41-3aa1-4d27-914a-91399e9639e5
  - url: >-
      https://github.com/aws/aws-network-policy-agent/security/advisories/GHSA-7xv7-8r3j-3j25
    label: ff89ba41-3aa1-4d27-914a-91399e9639e5
  - url: >-
      https://staging.prod.website.marketing.aws.dev/security/security-bulletins/2026-113-aws/
    label: ff89ba41-3aa1-4d27-914a-91399e9639e5
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-09-17T16:08:42.602503Z'
ingestedAt: '2026-09-16T20:03:30.761Z'
epss: 0.00643
epssPercentile: 0.48662
---

## Overview

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).

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.