CVE-2026-3012 HIGH

CVE-2026-3012: Samba: group policy certificate enrollment uses http:// without validation

Vendor Red Hat
Product Red Hat Enterprise Linux 6
Weakness CWE-345
Published May 27, 2026
Last update June 30, 2026

CVSS base score

8.0/10
Attack vector Adjacent
Attack complexity High
Privileges required None
User interaction None
Confidentiality High
Integrity High

CVSS vector

CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

May 27, 2026 CVE published
June 30, 2026 Record updated

Related vulnerabilities

04Related CVE