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No exploitation reportedAwaiting NVD analysis

CVE-2026-122266

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

No exploitation reported by the sources we read.

  • Published2026-11-04
  • WeaknessCWE-1189

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

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 later (which includes Network Policy Agent v1.3.7).

Timeline

dates in UTC
  1. 2026-11-0421:44CVE publishedCNA

Versions per branch

Products declared by the CNA

As AMZN, the CNA that assigned this CVE, declared them in the CVE record; versions as written. NVD lists no product for this CVE yet: this is the only product data so far.

  • aws-network-policy-agentother versions: not affected
    Affected
    • < 1.3.7fixed in 1.3.7custom
  • AWS amazon-vpc-cni-k8sother versions: not affected
    Affected
    • < 1.22.3fixed in 1.22.3custom

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2026-11-04

Neither OSV.dev nor the vendor advisories we read list affected versions for CVE-2026-122266 yet.

Full record on NVD

Fix

No fix published by the sources we read yet. NVD record

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Metasploit modules
none listed
Metasploit Framework

Sources

  • NVDCVE record2026-11-04
  • CNACVSS 4.06.32026-11-04
  • CNACVSS 3.18.72026-11-04
  • CNAweakness (CWE)CWE-11892026-11-04

Technical details

CVSS v3 Vector
CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
CVSS 4.0 vector
CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N
Published
2026-11-04

Frequently asked questions

What is CVE-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 using crafted AF_PACKET frames. To remediate this issue, users should upgrade to Amazon VPC CNI Managed Add-on v1.22.3 or later (which includes Network Policy Agent v1.3.7).

Is CVE-2026-122266 actively exploited?

Active exploitation of CVE-2026-122266 has not been confirmed.

What is the CVSS score for CVE-2026-122266?

CVE-2026-122266 has a CVSS v3 base score of 8.7 (HIGH severity), with vector string CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N.

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