CVE-2026-33254 MEDIUM

CVE-2026-33254: Resource exhaustion via DoQ/DoH3 connections

Vendor Powerdns
Product DNSdist
Published April 22, 2026
Last update April 22, 2026
View on NVD All CVEs

CVSS base score

5.3/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality None
Integrity None

CVSS vector

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

What the vulnerability does

01Description

An attacker can create a large number of concurrent DoQ or DoH3 connections, causing unlimited memory allocation in DNSdist and leading to a denial of service. DOQ and DoH3 are disabled by default.

Key dates

02Disclosure timeline

April 22, 2026 CVE published
April 22, 2026 Record updated