CVE-2026-42390
Deferred Deferred - Pending Action

Invalid ZONEMD Validation Bypass in BIND

Publication date: 2026-06-25

Last updated on: 2026-06-25

Assigner: Open-Xchange

Description
An invalid zone might pass ZONEMD validation while it should not. This is only relevant if ZoneToCache is configured with ZONEMD validation.

CVSS Scores

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Meta Information

Published
2026-06-25
Last Modified
2026-06-25
Generated
2026-07-15
AI Q&A
2026-06-25
EPSS Evaluated
2026-07-14
NVD
CVE-2026-42390
EUVD
EUVD-2026-39359

Affected Vendors & Products

Currently, no data is known.

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-20 The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

Attack-Flow Graph

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Executive Summary

This vulnerability involves an invalid zone that might pass ZONEMD validation when it should not. It specifically affects configurations where ZoneToCache is set up with ZONEMD validation enabled.

Impact Analysis

The impact of this vulnerability is limited to the integrity of zone data. Since an invalid zone can pass validation, it could lead to incorrect or malicious zone data being accepted. According to the CVSS score, it has a moderate impact on integrity but does not affect confidentiality or availability.

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