CVE-2026-93008

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.

CVSS v3 6.8 MEDIUM

6.8^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.2 / Impact : 4.0

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://access.redhat.com/security/cve/CVE-2026-93008
https://bugzilla.redhat.com/show_bug.cgi?id=2536079

Configurations

No configuration.

History

29 Oct 2026, 13:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-29 13:17

Updated : 2026-10-30 01:16

NVD link : CVE-2026-93008

Mitre link : CVE-2026-93008

CVE.ORG link : CVE-2026-93008

JSON object : View

Products Affected

No product.

CWE

CWE-345

Insufficient Verification of Data Authenticity

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