PowerDNS Denial-of-Service Vulnerability Due to NSEC to NSEC3 Zone Transition

Vulnerability

A denial-of-service vulnerability has been identified in PowerDNS Recursor. The issue arises when a zone transition from NSEC to NSEC3 occurs, potentially triggering an internal inconsistency that leads to a service disruption.

Impact

Exploitation of this vulnerability can cause a denial-of-service condition, disrupting the normal operation of the PowerDNS Recursor service.

Added: Apr 22, 2026, 11:15 AM
Updated: Apr 22, 2026, 11:15 AM

Vulnerability Rating

Custom Algorithm
spread
4.5
impact
2.5
exploitability
7.0
remediation
0.0
relevance
6.5
threat
0.0
urgency
2.9
incentive
4.2

Our algorithm analyzes dozens of metrics to generate these 8 key vulnerability categories, which are then combined to calculate the overall risk score.