Reject more queries with invalid header values

MITRE NVD CVE.ORG JSON API Print: PDF PDF

Summary

CVECVE-2026-42389
StatePUBLISHED
AssignerOX
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-06-25 14:16:39 UTC
Updated2026-06-25 16:16:35 UTC
DescriptionThis fix provides extra hardening for the 5.4.x branch by doing extra validation of incoming answers from authoritative servers.

Risk And Classification

Primary CVSS: v3.1 5.3 MEDIUM from [email protected]

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

Problem Types: CWE-20 | Improper Input Validation | CWE-20 CWE-20 Improper Input Validation

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary5.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
3.1CNACVSS5.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
None

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA PowerDNS Recursor affected 5.4.0 5.4.3 semver Not specified

References

ReferenceSourceLinkTags
docs.powerdns.com/recursor/security-advisories/powerdns-advisory-powerdns-2026-... [email protected] docs.powerdns.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Xiang Li, Mingming Zhang, Fasheng Miao, Zuyao Xu from AOSP Lab, Nankai University, Zhongguancun Lab, Tsinghua University (en)

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