CVE-2026-33600

MEDIUM

PowerDNS Recursor 5.2.0-5.2.8, 5.3.0-5.3.5, 5.4.0 - Denial of Service via RPZ Processing

Title source: llm

Description

An RPZ sent by a malicious authoritative server can result in a null pointer dereference, caused by a missing consistency check and leading to a denial of service.

References (1)

Core 1

Core References

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

Scores

CVSS v3 4.4

EPSS 0.0052

EPSS Percentile 40.0%

Attack Vector NETWORK

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

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-476

Status published

Products (5)

powerdns/recursor 5.4.0

PowerDNS/Recursor 5.2.0 - 5.2.9

powerdns/recursor 5.2.0 - 5.2.9

PowerDNS/Recursor 5.3.0 - 5.3.6

PowerDNS/Recursor 5.4.0 - 5.4.1

Published Apr 22, 2026

Tracked Since Apr 22, 2026