# CVE-2026-86831

EKS Network Policy Agent ID-collision allows NetworkPolicy bypass

- Page: https://www.vulneraibility.com/cve/CVE-2026-86831
- CVSS: 8.7
- Known exploited: not in CISA KEV as of our last sync
- EPSS: 0.64% (percentile 50.8)
- CISA SSVC: exploitation none, automatable no, technical impact total (assessed 2026-09-17)
- Weakness: CWE-1289
- Also known as: GHSA-7xv7-8r3j-3j25, GHSA-gjc7-c7mx-x8f3
- Published: 2026-09-16

## Affected versions

- AWS amazon-vpc-cni-k8s: affected >= 1.14.0 and < 1.22.4
- AWS aws-network-policy-agent: affected < 1.4.0

A version outside these ranges is not a statement that it is unaffected.

## Impact

Authenticated attacker can craft pod/namespace names to cause ID collisions, bypass NetworkPolicy and access co-located pods cross-namespace.

## Action

Immediate action required

## Recommendation

Upgrade aws-network-policy-agent to >=1.4.0 or amazon-vpc-cni-k8s to >=1.22.4

## References

- [patch] https://github.com/aws/amazon-vpc-cni-k8s/releases/tag/v1.22.4
- [patch] https://github.com/aws/aws-network-policy-agent/releases/tag/v1.4.0
- [advisory] https://aws.amazon.com/security/security-bulletins/2026-113-aws/
- [other] https://github.com/aws/aws-network-policy-agent/security/advisories/GHSA-7xv7-8r3j-3j25
- [other] https://github.com/aws/amazon-vpc-cni-k8s/security/advisories/GHSA-gjc7-c7mx-x8f3

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Summary, impact and action are written by the vulneraibility.com AI analysis pipeline from the CVE record, NVD, CISA and FIRST data; verify against the references.