# CVE-2026-3012

## Summary

- **CVE ID:** CVE-2026-3012
- **Severity:** HIGH
- **CVSS Score:** 8 (CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N)
- **CWE:** CWE-345
- **Published:** May 27, 2026
- **Last Modified:** Sep 17, 2026

## Description

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.

## Affected Products

- Red Hat — Red Hat Enterprise Linux 8 (0:4.19.4-16.el8_10)
- Red Hat — Red Hat Enterprise Linux 10 (0:4.23.5-109.el10_2)
- Red Hat — Red Hat Enterprise Linux 9 (0:4.23.5-10.el9_8)
- Red Hat — Red Hat Enterprise Linux 9.6 Extended Update Support (0:4.21.3-14.el9_6.1)
- Red Hat — Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support (0:4.15.5-16.el8_6.1)
- Red Hat — Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On (0:4.15.5-16.el8_6.1)
- Red Hat — Red Hat Enterprise Linux 10.0 Extended Update Support (0:4.21.3-114.el10_0.1)
- Red Hat — Red Hat Enterprise Linux 8.8 Telecommunications Update Service (0:4.17.5-7.el8_8.1)
- Red Hat — Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions (0:4.17.5-7.el8_8.1)
- Red Hat — Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions (0:4.17.5-105.el9_2.5)
- Red Hat — Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions (0:4.19.4-105.el9_4.4)
- Red Hat — Red Hat OpenShift Container Platform 4.19 (4.19.9.6.202606241344-0)
- Red Hat — Red Hat OpenShift Container Platform 4.18 (418.94.202608142238-0)
- Red Hat — Red Hat OpenShift Container Platform 4.14 (414.92.202608172040-0)
- Red Hat — Red Hat OpenShift Container Platform 4.15 (415.92.202608180329-0)
- Red Hat — Red Hat OpenShift Container Platform 4.16 (416.94.202608150307-0)
- Red Hat — Red Hat OpenShift Container Platform 4.12 (412.86.202608241157-0)
- Red Hat — Red Hat OpenShift Container Platform 4.17 (417.94.202608250221-0)
- Red Hat — Red Hat OpenShift Container Platform 4.16 (416.94.202609011112-0)
- Red Hat — Red Hat OpenShift Container Platform 4.14 (414.92.202609011250-0)
- Red Hat — Red Hat OpenShift Container Platform 4.18 (418.94.202609031320-0)
- Red Hat — Red Hat OpenShift Container Platform 4.12 (412.86.202609082051-0)
- Red Hat — Red Hat OpenShift Container Platform 4.13 (413.92.202609080414-0)

## References

- [CNA](https://access.redhat.com/security/cve/CVE-2026-3012)
- [CNA](https://bugzilla.redhat.com/show_bug.cgi?id=2447319)
- [CNA](https://bugzilla.samba.org/show_bug.cgi?id=16003)
- [CNA](https://access.redhat.com/errata/RHSA-2026:22644)
- [CNA](https://access.redhat.com/errata/RHSA-2026:22963)
- [CNA](https://access.redhat.com/errata/RHSA-2026:25049)
- [CNA](https://access.redhat.com/errata/RHSA-2026:25979)
- [CNA](https://access.redhat.com/errata/RHSA-2026:28057)
- [CNA](https://access.redhat.com/errata/RHSA-2026:28054)
- [CNA](https://access.redhat.com/errata/RHSA-2026:28055)
- [CNA](https://access.redhat.com/errata/RHSA-2026:28056)
- [CNA](https://access.redhat.com/errata/RHSA-2026:28053)
- [redhat-SADP](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-3012.json)
- [CNA](https://access.redhat.com/errata/RHSA-2026:29863)
- [CNA](https://access.redhat.com/errata/RHSA-2026:57483)
- [CNA](https://access.redhat.com/errata/RHSA-2026:56786)
- [CNA](https://access.redhat.com/errata/RHSA-2026:56853)
- [CNA](https://access.redhat.com/errata/RHSA-2026:56911)
- [CNA](https://access.redhat.com/errata/RHSA-2026:59831)
- [CNA](https://access.redhat.com/errata/RHSA-2026:60019)
- [CNA](https://access.redhat.com/errata/RHSA-2026:62549)
- [CNA](https://access.redhat.com/errata/RHSA-2026:62409)
- [CNA](https://access.redhat.com/errata/RHSA-2026:65851)
- [CNA](https://access.redhat.com/errata/RHSA-2026:65907)
- [CNA](https://access.redhat.com/errata/RHSA-2026:65839)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.26%
- **EPSS Percentile:** 18.1

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-18._