CVE-2026-33594

HighCVSS 7.5/10Last modified Oct 26, 2026

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.

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-770

Affected software

Vendor	Product	Versions
PowerDNS	DNSdist	>= 1.9.0, < 1.9.13; >= 2.0.0, < 2.0.4

References

https://www.dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2026-04.htmlVendor Advisory

Timeline

Published: Apr 22, 2026
Last modified: Oct 26, 2026
NVD status: Analyzed

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