CVE-2026-62994 — Security Box Score

CVE · referencelatest edition

Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-62994LOW

CoreDNS `k8s_external` headless AXFR can emit an empty transfer batch that panics the `transfer` plugin

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   H   N   N  U  N  N  L    3.7   .0029   22.1     —

AFFECTED
  Product  Versions              Fixed
  coredns  >= 1.9.4, < 1.14.5 –  —

TIMELINE
  Jul 14  Reserved by GitHub_M
  Jul 16  EXPLOIT PUBLISHED — CVE-2026-62994 (coredns). Public exploit reference added.
  Jul 16  Published (CNA: GitHub_M)

CWE-248, CWE-755 · CNA: GitHub_M · CVSS v3.1 · 4 references · NVD status: Analyzed

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.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
July 14, 2026	Reserved	Reserved by GitHub_M
July 16, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-62994 (coredns). Public exploit reference added.
July 16, 2026	Published	Published (CNA: GitHub_M)

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
coredns	coredns	—	>= 1.9.4, < 1.14.5	—

Weaknesses

CWE-248 · CWE-755

References (4)

https://github.com/coredns/coredns/commit/ab318db7b4a3a19273852ed627f54888198c8efb [Patch]
https://github.com/coredns/coredns/pull/8207 [Issue Tracking, Patch]
https://github.com/coredns/coredns/releases/tag/v1.14.5 [Release Notes]
https://github.com/coredns/coredns/security/advisories/GHSA-74w3-63xv-x9mv [Exploit, Third Party Advisory]

Authoritative record: CVE-2026-62994 at cve.org

Vendors: coredns

Weaknesses: CWE-248 · CWE-755

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-62994 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, August 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.