CVE-2026-33254

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.

Score

CVSS 3.1 7.5 High

Status

Analyzed - security@open-xchange.com

Published

2026-04-22

Last modified

2026-10-26

Weaknesses

CWE-770

Affected products

• Dnsdist (Powerdns)

References

• https://www.dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2026-04.html