High severity · published Sep 16, 2026
CVE-2026-86831
Improper validation of pod identifier uniqueness in aws-network-policy-agent in Amazon EKS
8.7
CVSS
0.6%
EPSS
No
On KEV
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).
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N
Attack vector
Network
Complexity
Low
Privileges
High
User interaction
None
Confidentiality
High
Integrity
High
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 51% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AM
amazon-vpc-cni-k8s · AWS
1.14.0 before 1.22.4 · source: vendor
AW
aws-network-policy-agent · AWS
before 1.4.0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-86831
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-86831
aws.amazon.com
https://aws.amazon.com/security/security-bulletins/2026-113-aws/
github.com
https://github.com/aws/amazon-vpc-cni-k8s/releases/tag/v1.22.4
github.com
https://github.com/aws/amazon-vpc-cni-k8s/security/advisories/GHSA-gjc7-c7mx-x8f3
github.com
https://github.com/aws/aws-network-policy-agent/releases/tag/v1.4.0
github.com
https://github.com/aws/aws-network-policy-agent/security/advisories/GHSA-7xv7-8r3j-3j25