{"id":"CVE-2026-62994","summary":"CoreDNS `k8s_external` headless AXFR can emit an empty transfer batch that panics the `transfer` plugin","details":"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.","aliases":["GHSA-74w3-63xv-x9mv"],"modified":"2026-08-12T03:51:47.684415040Z","published":"2026-07-16T19:39:05.582Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/62xxx/CVE-2026-62994.json","cna_assigner":"GitHub_M","cwe_ids":["CWE-248","CWE-755"]},"references":[{"type":"WEB","url":"https://github.com/coredns/coredns/releases/tag/v1.14.5"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/62xxx/CVE-2026-62994.json"},{"type":"ADVISORY","url":"https://github.com/coredns/coredns/security/advisories/GHSA-74w3-63xv-x9mv"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-62994"},{"type":"FIX","url":"https://github.com/coredns/coredns/commit/ab318db7b4a3a19273852ed627f54888198c8efb"},{"type":"FIX","url":"https://github.com/coredns/coredns/pull/8207"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/coredns/coredns","events":[{"introduced":"1f0a41a66597cb8ab4aace8ea5b5bad880bcd23b"},{"fixed":"adba3b3703408ffe80bc03a7be0f6ea9c2372399"},{"fixed":"ab318db7b4a3a19273852ed627f54888198c8efb"}],"database_specific":{"source":["CPE_RANGE","REFERENCES"],"cpe":"cpe:2.3:a:coredns.io:coredns:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"1.9.4"},{"fixed":"1.14.5"}]}}],"versions":["v1.14.4","v1.14.3","v1.14.2","v1.14.1","v1.14.0","v1.13.2","v1.13.1","v1.13.0","v1.12.4","v1.12.3","v1.12.2","v1.12.1","v1.12.0","v1.11.4","v1.11.3","v1.11.1","v1.11.0","v1.10.1","v1.10.0","v1.9.4"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-62994.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L"}]}