CVE-2026-93008
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DNS Cache Poisoning via CNAME in Dnsmasq

Publication date: 2026-10-29

Last updated on: 2026-10-29

Assigner: redhat-SADP

Description
A flaw was found in dnsmasq. When following a CNAME in a DNS response, the resolver can cache records for the CNAME target without checking that those records belong to the responding server's authorized zone. In split-DNS deployments that send some domains to a specific upstream, an attacker who controls that upstream can inject cache entries for unrelated names. Later clients may then receive attacker-chosen addresses for those names.

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Meta Information

Published
2026-10-29
Last Modified
2026-10-29
Generated
2026-10-29
EPSS Evaluated
N/A
NVD
CVE-2026-93008
EUVD
EUVD-2026-112787

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-345 The product does not sufficiently verify the origin or authenticity of data, in a way that causes it to accept invalid data.

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