Vulnerability Details 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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 1.1%
CVSS Severity
CVSS v3 Score 5.3
Products affected by CVE-2026-33254
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cpe:2.3:a:powerdns:dnsdist:1.9.0
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cpe:2.3:a:powerdns:dnsdist:1.9.1
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cpe:2.3:a:powerdns:dnsdist:1.9.10
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cpe:2.3:a:powerdns:dnsdist:1.9.11
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cpe:2.3:a:powerdns:dnsdist:1.9.12
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cpe:2.3:a:powerdns:dnsdist:1.9.2
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cpe:2.3:a:powerdns:dnsdist:1.9.3
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cpe:2.3:a:powerdns:dnsdist:1.9.4
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cpe:2.3:a:powerdns:dnsdist:1.9.5
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cpe:2.3:a:powerdns:dnsdist:1.9.6
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cpe:2.3:a:powerdns:dnsdist:1.9.7
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cpe:2.3:a:powerdns:dnsdist:1.9.8
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cpe:2.3:a:powerdns:dnsdist:1.9.9
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cpe:2.3:a:powerdns:dnsdist:2.0.0
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cpe:2.3:a:powerdns:dnsdist:2.0.1
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cpe:2.3:a:powerdns:dnsdist:2.0.2
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cpe:2.3:a:powerdns:dnsdist:2.0.3