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CVE-2026-86831

Improper validation of pod identifier uniqueness in aws-network-policy-agent in Amazon EKS

HIGH
8.7
CVSS Score
Published: September 16, 2026 at 07:49 PM UTC
Updated: October 20, 2026 at 07:19 PM UTC
2 products affected across 1 vendorVpc Cni K8SEKS Network Policy Agent

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Severity
HIGH8.7
Exploit prediction
EPSS 0.6%
SSVC
No known exploit

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

EKS Network Policy Agent· AWS
90%
0
Affected range stops below 1.4.0, so it looks safe — our inference, not a vendor statement
Vpc Cni K8S· AWS
90%
1.14.0
Affected range stops below 1.22.4, so it looks safe — our inference, not a vendor statement

References (6)

PatchRelease Notes
Source: cverecord
https://github.com/aws/amazon-vpc-cni-k8s/releases/tag/v1.22.4
PatchRelease Notes
Source: cverecord
https://github.com/aws/aws-network-policy-agent/releases/tag/v1.4.0
Vendor Advisory
Source: cverecord
https://staging.prod.website.marketing.aws.dev/security/security-bulletins/2026-113-aws/
Release Notes
Source: cverecord
https://github.com/aws/aws-network-policy-agent/security/advisories/GHSA-7xv7-8r3j-3j25
Release Notes
Source: cverecord
https://github.com/aws/amazon-vpc-cni-k8s/security/advisories/GHSA-gjc7-c7mx-x8f3
Vendor Advisory
Source: cverecord
https://aws.amazon.com/security/security-bulletins/2026-113-aws/

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.7HIGHAMZN
Vector?

Quick Info

StatusAWAITING ANALYSIS
CWE
CWE-1289

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