CVE-2026-86831

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

Assigner: AMZN
Reserved: 08.09.2026 Published: 16.09.2026 Updated: 16.09.2026

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).

Metrics

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N
CVSS Score: 8.7

Attack Vector	Network	Scope	Changed
Attack Complexity	Low	Confidentiality Impact	High
Privileges Required	High	Integrity Impact	High
User Interaction	None	Availability Impact	None

CVSS 3.1

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N
CVSS Score: 8.7

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	High	Confidentiality	High
Attack Complexity	Low	Integrity	High	Integrity	High
Attack Requirements	Present	Availability	None	Availability	None
Privileges Required	High
User Interaction	None

CVSS 4.0

Product Status

Vendor	AWS
Product	aws-network-policy-agent
Versions	Default: unaffected affected from 0 to 1.4.0 (excl.)

Vendor

AWS

Product

aws-network-policy-agent

Versions

Default: unaffected

affected from 0 to 1.4.0 (excl.)

Vendor	AWS
Product	amazon-vpc-cni-k8s
Versions	Default: unaffected affected from 1.14.0 to 1.22.4 (excl.)

Vendor

AWS

Product

amazon-vpc-cni-k8s

Versions

Default: unaffected

affected from 1.14.0 to 1.22.4 (excl.)

References

Problem Types

CWE-1289 Improper validation of unsafe equivalence in input CWE

Impacts