CVE-2026-3012
Samba: group policy certificate enrollment uses http:// without validation
CVSS Score
8.0
EPSS Score
0.0%
EPSS Percentile
0th
A flaw was found in Samba’s certificate auto-enrollment Group Policy handling. When certificate auto-enrollment is enabled, Samba may retrieve a CA certificate over an unencrypted HTTP connection and install it into the local trust store without proper verification. An attacker with the ability to intercept or redirect network traffic could exploit this behavior to supply a malicious certificate authority certificate, potentially allowing interception or spoofing of trusted communications.
| CWE | CWE-345 |
| Vendor | red hat |
| Product | red hat enterprise linux 10 |
| Published | May 27, 2026 |
| Last Updated | Jun 8, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N Attack Vector
Adjacent
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
None
Affected Versions
Red Hat / Red Hat Enterprise Linux 10
All versions affected Red Hat / Red Hat Enterprise Linux 8
All versions affected Red Hat / Red Hat Enterprise Linux 8
All versions affected Red Hat / Red Hat Enterprise Linux 6
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 9
All versions affected Red Hat / Red Hat OpenShift Container Platform 4
All versions affected References
access.redhat.com: https://access.redhat.com/errata/RHSA-2026:22644 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:22963 access.redhat.com: https://access.redhat.com/security/cve/CVE-2026-3012 bugzilla.redhat.com: https://bugzilla.redhat.com/show_bug.cgi?id=2447319 bugzilla.samba.org: https://bugzilla.samba.org/show_bug.cgi?id=16003
Credits
Red Hat would like to thank Arad Inbar (DREAM Security Research Team), Ben Grinberg (DREAM Security Research Team), Michalis Vasileiadis, and Nir Somech (DREAM Security Research Team) for reporting this issue.