Vulnerability in Coredns
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 3.7 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L.
EPSS exploit prediction
EPSS: 0.005 (38.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 38th percentile — 38.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
- Coredns — versions >= 1.9.4, < 1.14.5
- Coredns.io Coredns
Weakness classification (CWE)
References
- github.com/coredns/coredns/security/advisories/GHSA-74w3-63xv-x9mv (Exploit, Third Party Advisory)
- github.com/coredns/coredns/pull/8207 (Patch, Issue Tracking)
- github.com/coredns/coredns/commit/ab318db7b4a3a19273852ed627f54888198c8efb (Patch)
- github.com/coredns/coredns/releases/tag/v1.14.5 (Release Notes)
Frequently asked questions
- What is CVE-2026-62994?
- CVE-2026-62994 is a low-severity vulnerability in Coredns, classified under CWE-248. CVSS score: 3.7/10. Published 2026-07-16.
- How severe is CVE-2026-62994?
- Low severity. CVSS v3 base score is 3.7 out of 10.