Resource exhaustion via DoQ/DoH3 connections_CVE-2026-33254

5.3 / 10

MEDIUM

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

Description

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.

Basic Information

ID CVE-2026-33254

Source OX

Published Apr 22, 2026 at 13:45

Modified Apr 22, 2026 at 14:51

Affected Product

Vendor PowerDNS

Product DNSdist

Version 1.9.0

Affected Versions PowerDNS DNSdist 1.9.0
PowerDNS DNSdist 2.0.0

CWE Classification

CWE-770

References

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

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    "modified": "2026-04-22T14:51:51.130Z",
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