Vulnerability Description
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.
CVSS Score
LOW
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Coredns.Io | Coredns | >= 1.9.4, < 1.14.5 |
Related Weaknesses (CWE)
References
- https://github.com/coredns/coredns/commit/ab318db7b4a3a19273852ed627f54888198c8ePatch
- https://github.com/coredns/coredns/pull/8207Issue TrackingPatch
- https://github.com/coredns/coredns/releases/tag/v1.14.5Release Notes
- https://github.com/coredns/coredns/security/advisories/GHSA-74w3-63xv-x9mvExploitThird Party Advisory
- https://github.com/coredns/coredns/security/advisories/GHSA-74w3-63xv-x9mvExploitThird Party Advisory
FAQ
What is CVE-2026-62994?
CVE-2026-62994 is a vulnerability with a CVSS score of 3.7 (LOW). 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 headles...
How severe is CVE-2026-62994?
CVE-2026-62994 has been rated LOW with a CVSS base score of 3.7/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-62994?
Check the references section above for vendor advisories and patch information. Affected products include: Coredns.Io Coredns.