Vulnerability Details CVE-2026-62994
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.003
EPSS Ranking 21.7%
CVSS Severity
CVSS v3 Score 3.7
References
- https://github.com/coredns/coredns/commit/ab318db7b4a3a19273852ed627f54888198c8efb
- https://github.com/coredns/coredns/pull/8207
- https://github.com/coredns/coredns/releases/tag/v1.14.5
- https://github.com/coredns/coredns/security/advisories/GHSA-74w3-63xv-x9mv
- https://github.com/coredns/coredns/security/advisories/GHSA-74w3-63xv-x9mv
Products affected by CVE-2026-62994
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cpe:2.3:a:coredns.io:coredns:1.10.0
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cpe:2.3:a:coredns.io:coredns:1.10.1
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cpe:2.3:a:coredns.io:coredns:1.11.0
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cpe:2.3:a:coredns.io:coredns:1.11.1
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cpe:2.3:a:coredns.io:coredns:1.11.3
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cpe:2.3:a:coredns.io:coredns:1.11.4
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cpe:2.3:a:coredns.io:coredns:1.12.0
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cpe:2.3:a:coredns.io:coredns:1.12.1
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cpe:2.3:a:coredns.io:coredns:1.12.2
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cpe:2.3:a:coredns.io:coredns:1.12.3
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cpe:2.3:a:coredns.io:coredns:1.12.4
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cpe:2.3:a:coredns.io:coredns:1.13.0
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cpe:2.3:a:coredns.io:coredns:1.13.1
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cpe:2.3:a:coredns.io:coredns:1.13.2
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cpe:2.3:a:coredns.io:coredns:1.14.0
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cpe:2.3:a:coredns.io:coredns:1.14.1
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cpe:2.3:a:coredns.io:coredns:1.14.2
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cpe:2.3:a:coredns.io:coredns:1.14.3
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cpe:2.3:a:coredns.io:coredns:1.14.4
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cpe:2.3:a:coredns.io:coredns:1.9.4