CVE-2026-62994
CoreDNS `k8s_external` headless AXFR can emit an empty transfer batch that panics the `transfer` plugin
CVSS Score
3.7
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-248 CWE-755 |
| Vendor | coredns |
| Product | coredns |
| Published | Jul 16, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
Low
Affected Versions
coredns / coredns
>= 1.9.4, < 1.14.5
References
github.com: https://github.com/coredns/coredns/security/advisories/GHSA-74w3-63xv-x9mv github.com: https://github.com/coredns/coredns/pull/8207 github.com: https://github.com/coredns/coredns/commit/ab318db7b4a3a19273852ed627f54888198c8efb github.com: https://github.com/coredns/coredns/releases/tag/v1.14.5