CVE-2026-93008
Dnsmasq: dnsmasq: out-of-bailiwick cache injection through cname chase in split-dns configurations
CVSS Score
6.8
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-345 |
| Vendor | red hat |
| Product | red hat ceph storage 9 |
| Published | Oct 29, 2026 |
Stay Ahead of the Next One
Get instant alerts for red hat red hat ceph storage 9
Be the first to know when new medium vulnerabilities affecting red hat red hat ceph storage 9 are published — delivered to Slack, Telegram or Discord.
Get Free Alerts →
Free · No credit card · 60 sec setup
CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:N Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Changed
Confidentiality
None
Integrity
High
Availability
None
Affected Versions
Red Hat / Red Hat Ceph Storage 9
All versions affected Red Hat / Red Hat Enterprise Linux 10
All versions affected Red Hat / Red Hat Enterprise Linux 6
All versions affected Red Hat / Red Hat Enterprise Linux 7
All versions affected Red Hat / Red Hat Enterprise Linux 8
All versions affected Red Hat / Red Hat Enterprise Linux 9
All versions affected Red Hat / Red Hat OpenShift Container Platform 4
All versions affected Red Hat / Red Hat OpenShift Container Platform 4
All versions affected Red Hat / Red Hat OpenShift Container Platform 4
All versions affected Red Hat / Red Hat OpenShift Container Platform 4
All versions affected Red Hat / Red Hat OpenStack Platform 13 (Queens)
All versions affected Red Hat / Red Hat OpenStack Platform 18.0
All versions affected References
Credits
Red Hat would like to thank Shubham Raj (Causal Security) for reporting this issue.