CoreDNS `k8s_external` headless AXFR can emit an empty transfer batch that panics the `transfer` plugin

Summary A network DNS client allowed to request AXFR for a CoreDNS zone can trigger a panic when CoreDNS is configured with k8sexternal headless-service zone transfers and Kubernetes contains a headless service endpoint with no declared ports. The built-in k8sexternal transferer can emit an empty...

CVE-2026-62994

A flaw was found in CoreDNS, a DNS server. A remote attacker can trigger a denial of service by sending a specially crafted AXFR request to a CoreDNS zone. This occurs when CoreDNS is configured with k8sexternal headless-service zone transfers and Kubernetes contains a headless service endpoint...

AZL-92895 CVE-2026-62994 affecting package coredns for versions less than 1.11.4-20

CoreDNS is a DNS server written in Go. From 1.9.4 until 1.14.5, a network DNS client allowed to request AXFR for a CoreDNS zone can trigger a panic when CoreDNS is configured with k8sexternal headless-service zone transfers and Kubernetes contains a headless service endpoint with no declared port...

CVE-2026-62994: Uncaught Exception

CoreDNS is a DNS server written in Go. From 1.9.4 until 1.14.5, a network DNS client allowed to request AXFR for a CoreDNS zone can trigger a panic when CoreDNS is configured with k8sexternal headless-service zone transfers and Kubernetes contains a headless service endpoint with no declared port...