CVE-2026-93008 (GCVE-0-2026-93008)

Vulnerability from cvelistv5 – Published: 2026-10-29 12:33 – Updated: 2026-10-30 00:23
VLAI
Title
Dnsmasq: dnsmasq: out-of-bailiwick cache injection through cname chase in split-dns configurations
Summary
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.
Severity
6.8 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:N
CWE
  • CWE-345 - Insufficient Verification of Data Authenticity
Assigner
redhat CNA under the redhat root
CNA scorecard B 82/100 over 1077 records in the last 180 days details
References
URL Tags
https://access.redhat.com/security/cve/CVE-2026-93008 vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2536079 issue-trackingx_refsource_REDHAT
Impacted products
Date Public
2026-10-28 09:32
Credits
Red Hat would like to thank Shubham Raj (Causal Security) for reporting this issue.
Show details on NVD website
To clipboard 

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