CVE-2026-33261

Severity CVSS v4.0:

Pending analysis

Type:

Unavailable / Other

Publication date:

22/04/2026

Last modified:

22/04/2026

Description

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

Impact

Vector 3.x

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 5.90 MEDIUM
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector (AV): Network
Attack Complexity (AC): High
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High

Base Score 3.x

5.90

Severity 3.x

MEDIUM

References to Advisories, Solutions, and Tools

https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-powerdns-2026-03.html