Vulnerability-Lookup

CVE-2026-62994 (GCVE-0-2026-62994)

Vulnerability from cvelistv5 – Published: 2026-07-16 19:39 – Updated: 2026-07-17 11:12

Title

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

Summary

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.

Severity

3.7 (Low)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-07-17 11:12 UTC

CWE

CWE-248 - Uncaught Exception
CWE-755 - Improper Handling of Exceptional Conditions

Assigner

GitHub_M mitre root

References

4 references

URL	Tags
https://github.com/coredns/coredns/security/advis…	x_refsource_CONFIRM
https://github.com/coredns/coredns/pull/8207	x_refsource_MISC
https://github.com/coredns/coredns/commit/ab318db…	x_refsource_MISC
https://github.com/coredns/coredns/releases/tag/v1.14.5	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version	CPE status
coredns	coredns	Affected: >= 1.9.4, < 1.14.5	guessed

Show details on NVD website

JSON

To clipboard

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}

FKIE_CVE-2026-62994

Vulnerability from fkie_nvd - Published: 2026-07-16 20:16 - Updated: 2026-07-22 20:14

Severity

3.7 (Low) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

Summary

References

URL	Tags
security-advisories@github.com	https://github.com/coredns/coredns/commit/ab318db7b4a3a19273852ed627f54888198c8efb	Patch
security-advisories@github.com	https://github.com/coredns/coredns/pull/8207	Issue Tracking, Patch
security-advisories@github.com	https://github.com/coredns/coredns/releases/tag/v1.14.5	Release Notes
security-advisories@github.com	https://github.com/coredns/coredns/security/advisories/GHSA-74w3-63xv-x9mv	Exploit, Third Party Advisory
134c704f-9b21-4f2e-91b3-4a467353bcc0	https://github.com/coredns/coredns/security/advisories/GHSA-74w3-63xv-x9mv	Exploit, Third Party Advisory

Impacted products

	Vendor	Product	Version
	coredns.io	coredns	*

JSON

To clipboard

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    }
  ],
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  "lastModified": "2026-07-22T20:14:36.067",
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    },
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      ],
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      "type": "Secondary"
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  ]
}

MSRC_CVE-2026-62994

Vulnerability from csaf_microsoft - Published: 2026-07-23 01:02 - Updated: 2026-08-09 01:40

Summary

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

Scope

1 vulnerability in this advisory, including CVE-2026-62994.

CVE-2026-62994

3.7 (Low)


                
                  CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

Fixed: 1 product Known affected: 2 products

https://learn.microsoft.com/en-us/azure/azure-linux/tutoria…

Open the full advisory

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2026-62994 (GCVE-0-2026-62994)

FKIE_CVE-2026-62994

MSRC_CVE-2026-62994

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Related by attack behaviour