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Vulnerabilities

Vulnerability · CVE-2026-122266

CVE-2026-122266 - Improper isolation of shared resources in aws-network-policy-agent in Amazon EKS

Published Nov 4, 2026 · catalog updated Nov 4, 2026 · Amazon Web Services

Last checked Nov 8, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2026-122266. EPSS is 0.27%. Act only if a listed version of Amazon Web Services is installed.

Gaps on this record

  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
High8.7
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.27%
Remediation
Advisory link
Affected products
vendor AWS amazon-vpc-cni-k8s · vendor AWS aws-network-policy-agent

Bulletin ID: 2026-170-AWS Publication Date: 11/04/2026 13:30 PM PST Description: We identified CVE-2026-122266, an issue in Amazon EKS Network Policy Agent (aws-network-policy-agent). Improper isolation of shared eBPF connection tracking state might allow an authenticated adjacent user to bypass NetworkPolicy ingress enforcement on co-located pods. Impacted versions: - aws-network-policy-agent - Amazon VPC CNI Managed Add-on Refer to the article below for the most up-to-date and complete information.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor AWS amazon-vpc-cni-k8sversion unspecified
  • vendor AWS aws-network-policy-agentversion unspecified

How to fix CVE-2026-122266

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-122266. EPSS is 0.27%. Act only if a listed version of Amazon Web Services is installed.

Which versions are affected?

Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-1189. EPSS 0.27%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Nov 4, 2026 · CVE.org

    Updated

    Improper isolation of shared resources in aws-network-policy-agent in Amazon EKS Network Policy Agent before 1.3.7 (VPC CNI before 1.22.3) might allow an authenticated adjacent user to bypass NetworkPolicy ingress enforcement on co-located pods via eBPF conntrack map poisoning using crafted AF_PACKET frames. To remediate this issue, users should upgrade to Amazon VPC CNI Managed Add-on v1.22.3 or

  2. Nov 4, 2026 · AWS Security Bulletins

    Detected

    Bulletin ID: 2026-170-AWS Publication Date: 11/04/2026 13:30 PM PST Description: We identified CVE-2026-122266, an issue in Amazon EKS Network Policy Agent (aws-network-policy-agent). Improper isolation of shared eBPF connection tracking state might allow an authenticated adjacent user to bypass NetworkPolicy ingress enforcement on co-located pods. Impacted versions: - aws-network-policy-agent - A

Sources

  • AWS Security BulletinsVendor advisoryCVE-2026-122266

    Bulletin ID: 2026-170-AWS Publication Date: 11/04/2026 13:30 PM PST Description: We identified CVE-2026-122266, an issue in Amazon EKS Network Policy Agent (aws-network-policy-agent). Improper isolation of shared eBPF connection tracking state might allow an authenticated adjacen

    aws.amazon.com
  • CVE.orgVulnerability recordCVE-2026-122266

    Improper isolation of shared resources in aws-network-policy-agent in Amazon EKS Network Policy Agent before 1.3.7 (VPC CNI before 1.22.3) might allow an authenticated adjacent user to bypass NetworkPolicy ingress enforcement on co-located pods via eBPF conntrack map poisoning us

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-122266

    30-day exploitation probability 0.27%

    first.org

References

Freshness

Last verified in this catalog Nov 7, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • AWS Security BulletinsNov 8, 2026
  • FIRST EPSSNov 7, 2026
  • CVE.orgNov 5, 2026