🛡️ CVE-2026-62994 — coredns

🟢 CVSS 3.7 — Low ⚠️ Exploit Public CWE-248 NVD
3.7
CVSS Score
0 Low4 Medium7 High9 Critical10

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.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is high, an attacker needs no privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality none, integrity none, availability low.

Weakness class

CVE-2026-62994 is classified as CWE-248: Uncaught Exception. An exception is thrown from a function, but it is not caught.

Affected software

CVE-2026-62994 is recorded against 1 package.

  • coredns (from 1.9.4 up to 1.14.5)

Timeline and source

Published on 16 July 2026 and last revised on 22 July 2026. A public exploit is known to exist, which raises the urgency of patching considerably. A vendor advisory or fix has been published. Record sourced from NVD.

References

github.com
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github.com
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Details

Severity LOW
CVSS Score 3.7
CVSS Vector CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
CWE CWE-248
Public Exploit ⚠️ Yes
Source NVD
Published 2026-07-16
Updated 2026-08-11
Modified 2026-07-22

Affected Packages

Software From version Fixed in
coredns 1.9.4 1.14.5

Similar Threats

Exploit Protection

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