CVE-2026-42389 - Vulnerability Details - OpenCVE

This fix provides extra hardening for the 5.4.x branch by doing extra validation of incoming answers from authoritative servers.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact Low

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Exploitation none

Automatable yes

Technical Impact partial

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

PowerDNS

Recursor

unaffected

Version	Status	Constraints
`5.4.0`	affected	< 5.4.3

No data.

No data.

OpenCVE Enrichment is a feature of OpenCVE that uses AI to automatically link vendors and products to CVEs. Learn more on GitHub.

No data.

Project Subscriptions

No data.

Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References

Link	Providers
https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-powerdns-2026-08.html

History

Thu, 25 Jun 2026 15:30:00 +0000

Type	Values Removed	Values Added
Weaknesses		CWE-20
Metrics		ssvc `{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Thu, 25 Jun 2026 14:00:00 +0000

Type	Values Removed	Values Added
Description		This fix provides extra hardening for the 5.4.x branch by doing extra validation of incoming answers from authoritative servers.
Title		Reject more queries with invalid header values
References		https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-powerdns-2026-08.html
Metrics		cvssV3_1 `{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N'}`

Projects

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MITRE

Status: PUBLISHED

Assigner: OX

Published: 2026-06-25T13:16:45.245Z

Updated: 2026-06-25T14:58:17.088Z

Reserved: 2026-04-27T08:53:58.839Z

Link: CVE-2026-42389

Vulnrichment

Updated: 2026-06-25T14:57:57.948Z

NVD

No data.

Redhat

No data.

OpenCVE Enrichment

Updated: 2026-06-25T17:00:11Z

Weaknesses

CWE-20

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