CVE-2026-62994: CoreDNS is a DNS server written in Go

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LOW 3.7REMOTEUPGRADE

CVE-2026-62994 is a low-severity flaw (CVSS 3.7) affecting coredns. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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

Why this priority

Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	3.7 (Low)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	0.5% (top 60%)
CISA exploited list	No
Weakness	CWE-248, CWE-755
Published	2026-07-16
Last modified	2026-07-22

Publisher (CNA): GitHub, Inc. · Vendor: coredns.io

Last updated 2026-07-22 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-07-16 20:16 UTCPublished CVE record published
2026-07-22 20:14 UTCUpdated Record last modified

coredns.io coredns UPGRADE

Affected: >= 1.9.4 and < 1.14.5

Fixed in: 1.14.5

Safe to downgrade to: a release before 1.9.4

1. Check installed version

apt-cache policy coredns || rpm -q coredns || coredns --version

2. UPGRADE to 1.14.5 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade coredns

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade coredns

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 1.9.4 (Debian / Ubuntu)

apt-cache madison coredns sudo apt install coredns=<VERSION_BEFORE_1.9.4> sudo apt-mark hold coredns

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list coredns sudo dnf downgrade coredns-<VERSION_BEFORE_1.9.4> sudo dnf versionlock add coredns

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-62994?

coredns: upgrade to 1.14.5. Exact commands for each OS are on this page.

Is CVE-2026-62994 being exploited?

CVE-2026-62994 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-62994 affect?

CVE-2026-62994 affects coredns. Severity is low (CVSS 3.7). 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

How urgent is CVE-2026-62994?

Priority 33/100. Public exploit reference; Remotely exploitable, no login, no user action

Software pages

Kubernetes vulnerabilities

Related CVEs

CVE-2026-62299 MEDIUM 5.3 UPGRADE CoreDNS is a DNS server written in Go
CVE-2026-62309 HIGH 7.5 UPGRADE CoreDNS is a DNS server written in Go

References

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