{"id":"CVE-2026-122266","aliases":["EUVD-2026-117182"],"status":"published","title":"Improper isolation of shared resources in aws-network-policy-agent in Amazon EKS","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.\n\n\n\nTo 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).","severity":{"version":"4.0","score":6.3,"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","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00272,"percentile":0.1977,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-1189"],"published":"2026-11-04T21:44:07Z","modified":"2026-11-08T02:56:08Z","products":[{"vendor":"aws","product":"amazon-vpc-cni-k8s"},{"vendor":"aws","product":"aws-network-policy-agent"}],"references":[{"url":"https://github.com/aws/aws-network-policy-agent/releases/tag/v1.3.7","tags":["release-notes","patch","fix"]},{"url":"https://github.com/aws/amazon-vpc-cni-k8s/releases/tag/v1.22.3","tags":["release-notes","patch","fix"]},{"url":"https://aws.amazon.com/security/security-bulletins/2026-170-aws/","tags":["vendor-advisory","advisory"]},{"url":"https://github.com/aws/aws-network-policy-agent/security/advisories/GHSA-mm5f-ggvx-hmvw","tags":["third-party-advisory","advisory"]},{"url":"https://github.com/aws/amazon-vpc-cni-k8s/security/advisories/GHSA-rp3x-m95q-87mx","tags":["third-party-advisory","advisory"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/122xxx/CVE-2026-122266.json","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-122266","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2026-122266","title":"Improper isolation of shared resources in aws-network-policy-agent in Amazon EKS","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.\n\n\n\nTo 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).","status":"published","published":"2026-11-04T21:44:07.128Z","modified":"2026-11-09T20:41:18.936Z","cvss":[{"version":"4.0","score":6.3,"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","level":"medium","assessor":"cna"},{"version":"3.1","score":8.7,"vector":"CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N","level":"high","assessor":"cna"}],"cwes":["CWE-1189"],"updated_at":"2026-11-09T21:34:55.043741Z"}],"euvd":[{"id":"EUVD-2026-117182","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.\n\n\n\nTo 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).","status":"published","published":"2026-11-04T21:44:07Z","modified":"2026-11-09T20:41:18Z","cvss":[{"version":"4.0","score":6.3,"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","level":"medium"}],"updated_at":"2026-11-09T22:18:21.971974Z"}],"nvd":[{"id":"CVE-2026-122266","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.\n\n\n\nTo 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).","status":"published","published":"2026-11-04T22:17:56.383Z","modified":"2026-11-12T19:24:37.847Z","cvss":[{"version":"4.0","score":6.3,"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium","assessor":"secondary"},{"version":"3.1","score":8.7,"vector":"CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N","level":"high","assessor":"secondary"}],"cwes":["CWE-1189"],"updated_at":"2026-11-09T23:16:04.854042Z"}],"osv":[{"id":"CVE-2026-122266","title":"Improper isolation of shared resources in aws-network-policy-agent in Amazon EKS","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.\n\n\n\nTo 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).","status":"published","published":"2026-11-04T21:44:07.128Z","modified":"2026-11-11T02:30:58.147710622Z","cvss":[{"version":"4.0","score":6.3,"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","level":"medium"}],"cwes":["CWE-1189"],"updated_at":"2026-11-08T03:29:44.777002Z"}]}}