---
id: CVE-2026-122266
title: >-
  Improper isolation of shared resources in aws-network-policy-agent in Amazon
  EKS
summary: >-
  Improper isolation of shared resources in aws-network-policy-agent in Amazon
  EKS Network Policy Agent before 1.3.7 (VPC CNI before 1.22.3) might allow an
  authenticated adjacent user to bypass NetworkPolicy ingress enforcement on
  co-locat…
severity: high
cvss: 8.7
cvssVector: 'CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N'
cvssSource: cna
cwe:
  - CWE-1189
vendor: AWS
product: aws-network-policy-agent
affected:
  - aws-network-policy-agent < 1.3.7
  - amazon-vpc-cni-k8s < 1.22.3
published: '2026-11-04'
updated: '2026-11-04'
sourceUpdated: '2026-11-04T21:50:30.839Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-122266'
references:
  - url: 'https://github.com/aws/aws-network-policy-agent/releases/tag/v1.3.7'
  - url: 'https://github.com/aws/amazon-vpc-cni-k8s/releases/tag/v1.22.3'
  - url: 'https://aws.amazon.com/security/security-bulletins/2026-170-aws/'
  - url: >-
      https://github.com/aws/aws-network-policy-agent/security/advisories/GHSA-mm5f-ggvx-hmvw
tags:
  - cve.org
ingestedAt: '2026-11-05T21:36:00.627Z'
---

## Overview

Improper isolation of shared resources in aws-network-policy-agent in Amazon EKS Network Policy Agent before 1.3.7 (VPC CNI before 1.22.3) might allow an authenticated adjacent user to bypass NetworkPolicy ingress enforcement on co-located pods via eBPF conntrack map poisoning using crafted AF_PACKET frames.



To remediate this issue, users should upgrade to Amazon VPC CNI Managed Add-on v1.22.3 or later (which includes Network Policy Agent v1.3.7).

## Affected

- `aws-network-policy-agent < 1.3.7`
- `amazon-vpc-cni-k8s < 1.22.3`

## Remediation

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