Outgoing DoH excessive memory allocation_CVE-2026-33594

5.3 / 10

MEDIUM

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

Description

A client can trigger excessive memory allocation by generating a lot of queries that are routed to an overloaded DoH backend, causing queries to accumulate into a buffer that will not be released until the end of the connection.

Basic Information

ID CVE-2026-33594

Source OX

Published Apr 22, 2026 at 13:48

Modified Apr 22, 2026 at 14:36

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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