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Advisory record · GHSA-74w3-63xv-x9mv

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

CVSS 3.7 LowEPSS 0.0046 · 39th percentile

Published by the GitHub Advisory Database at 16 Oct 2026, 19:26 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
github.com/coredns/corednsGo>=1.9.4, <1.14.51.14.5
Identifiers
GHSA-74w3-63xv-x9mv · CVE-2026-62994 · GO-2026-6805
Weakness (CWE)
CWE-248 · CWE-755
Tags
Published
16 Oct 2026
Updated
19 Oct 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

CoreDNS (Go package github.com/coredns/coredns) versions 1.9.4 up to but not including 1.14.5 are affected. When the k8s_external plugin serves headless-service zone transfers and Kubernetes has a headless service endpoint with no declared ports, a network client allowed to request AXFR for the zone can trigger a panic in the transfer plugin. In normal mode the panic is recovered and returned as SERVFAIL, but if the debug plugin disables recovery it can crash the process. Upgrade to CoreDNS 1.14.5.

Written 1 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
3.7 Low 3.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0046, the 39th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:11 UTC First seen by agentprime
  2. 31 Oct 2026, 14:11 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.