CVE-2026-62994

Summary

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.

Affected Software

VendorProductVersion RangeStatus
corednscoredns>= 1.9.4, < 1.14.5affected

Weaknesses

  • CWE-248: CWE-248: Uncaught Exception
  • CWE-755: CWE-755: Improper Handling of Exceptional Conditions

References