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CVE-2026-3012

Samba: group policy certificate enrollment uses http:// without validation

Published: May 27, 2026Updated: May 27, 2026 Sources: CVE List NVD
NVD MITRE
8.0CVSS
HIGH

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.

EPSS Score
N/A
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Workaround Only

CVSS Vector Breakdown

AV:AAC:HPR:NUI:NS:CC:HI:HA:N
Exploitability
AV:AAttack Vector
Adjacent
AC:HAttack Complexity
High
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:CScope
Changed
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:NAvailability
None

Affected Products

Red Hat Enterprise Linux 10
Red Hat
Red Hat Enterprise Linux 6
Red Hat
Red Hat Enterprise Linux 7
Red Hat
Red Hat Enterprise Linux 8
Red Hat
Red Hat Enterprise Linux 9
Red Hat
and 1 more affected products View all →

Exploitability

Workaround Available

References

https://access.redhat.com/security/cve/CVE-2026-3012
access.redhat.com
https://bugzilla.redhat.com/show_bug.cgi?id=2447319
bugzilla.redhat.com
https://bugzilla.samba.org/show_bug.cgi?id=16003
bugzilla.samba.org

Timeline

Published
May 27, 2026
Last Updated
May 27, 2026

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