CVE-2026-24030: Powerdns Dnsdist

High severity, CVSS 7.5. EPSS: 0.5% chance of exploitation in the next 30 days.

An attacker might be able to trick DNSdist into allocating too much memory while processing DNS over QUIC or DNS over HTTP/3 payloads, resulting in a denial of service. In setups with a large quantity of memory available this usually results in an exception and the QUIC connection is properly closed, but in some cases the system might enter an out-of-memory state instead and terminate the process.

Affected products

• Powerdns Dnsdist: from 1.9.0, before 1.9.12 (fixed in 1.9.12); from 2.0.0, before 2.0.3 (fixed in 2.0.3)

Published 2026-03-31. Last modified 2026-07-25.