PowerDNS Recursor CVE-2026-33261

| EUVD-2026-24727 MEDIUM
Missing Support for Integrity Check (CWE-353)
5.9
CVSS 3.1
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CVSS VectorNVD

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

Lifecycle Timeline

2
Analysis Generated
Apr 22, 2026 - 13:10 vuln.today
Patch available
Apr 22, 2026 - 11:16 EUVD

DescriptionNVD

A zone transition from NSEC to NSEC3 might trigger an internal inconsistency and cause a denial of service.

AnalysisAI

PowerDNS Recursor versions 5.2.x, 5.3.x, and 5.4.0 are vulnerable to denial of service when processing a zone transition from NSEC to NSEC3 DNSSEC record types, causing internal inconsistency and resolver unavailability. The vulnerability requires network access but elevated attack complexity, affecting recursive DNS resolvers in production environments. …

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CVE-2026-33261 vulnerability details – vuln.today

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