CVE-2026-86831— Improper validation of pod identifier uniqueness in aws-network-policy-agent in Amazon EKS
Quick assessment
Affected
AWS aws-network-policy-agent
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Amazon EKS 网络策略代理（Amazon EKS Network Policy Agent）在 v1.4.0 之前对 Pod 标识符唯一性的验证不当，可能导致经过身份验证的远程用户通过构造能产生 Pod 标识符冲突的 Pod 和命名空间名称，绕过其他命名空间中同集群（co-located）Pod 的网络策略（NetworkPolicy）强制执行机制。 为解决此问题，用户应升级到 Amazon EKS Network Policy Agent 1.4.0 或更高版本，以及 Amazon VPC CNI 托管附
Possible ATT&CK Techniques 1 AI
T1598 · Phishing for InformationAffected Version Matrix 2
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| AWS | amazon-vpc-cni-k8s | 1.14.0< 1.22.4 |
affected |
| AWS | aws-network-policy-agent | < 1.4.0 |
affected |
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I. Basic Information for CVE-2026-86831
Vulnerability Information
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Vulnerability Title
Improper validation of pod identifier uniqueness in aws-network-policy-agent in Amazon EKS
Source: CVE Program / CVE List V5
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).
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-1289
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| AWS | aws-network-policy-agent | 0 ~ 1.4.0 | - |
|
| AWS | amazon-vpc-cni-k8s | 1.14.0 ~ 1.22.4 | - |
|
II. Public POCs for CVE-2026-86831
| # | POC Description | Source Link | Shenlong Link |
|---|
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Other References for CVE-2026-86831 (5)
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🔗 Midway Authentication Portal vendor-advisory
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