CVE-2026-62994
LowCVSS 3.7Exploitation Probability (EPSS)
Low risk20th percentile - higher than 20% of all known CVEs
Summary
In CoreDNS from version 1.9.4 to 1.14.5, a network DNS client requesting AXFR zone transfer can trigger a panic when configured with k8s_external headless-service zone transfers and a headless service endpoint with no declared ports. Fixed in version 1.14.5.
Risk Assessment
An attacker with network access can cause a CoreDNS server crash, leading to DNS resolution disruption in the Kubernetes cluster.
Recommendation
Immediately update CoreDNS to version 1.14.5 or later.
Original NVD description (English source)
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 k8s_external headless-service zone transfers and Kubernetes contains a headless service endpoint with no declared ports; plugin/kubernetes/object/endpoint.go creates Port: -1, plugin/k8s_external/msg_to_dns.go skips that service, plugin/k8s_external/transfer.go sends an empty []dns.RR batch, and plugin/transfer/transfer.go indexes records[0] without checking the batch is non-empty. This issue is fixed in version 1.14.5.