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High 8.0Published May 27, 2026
CVE-2026-3012Samba: group policy certificate enrollment uses http:// without validation
Updated under an hour ago ()
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It affects Red Hat Enterprise Linux 10 and 9 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 8.0 HIGH (v3.1, CNA)CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N
- Weakness (CWE)
- CWE-345
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- redhat
- NVD analysis
- Modified
- Record last updated
- Oct 15, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Red Hat Red Hat Enterprise Linux 10 redhat:enterprise_linux | from 0:4.23.5-109.el10_2 not affected | CNA record |
Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support redhat:enterprise_linux_eus | from 0:4.21.3-114.el10_0.1 not affected | CNA record |
from 0:4.15.5-16.el8_6.1 not affected | CNA record | |
Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support redhat:rhel_eus_long_life | from 0:4.15.5-16.el8_6.1 not affected | CNA record |
from 0:4.17.5-7.el8_8.1 not affected | CNA record | |
from 0:4.17.5-7.el8_8.1 not affected | CNA record | |
Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support redhat:rhel_eus | from 0:4.21.3-14.el9_6.1 not affected | CNA record |
Red Hat Red Hat OpenShift Container Platform 4.12 redhat:openshift | from 412.86.202608241157-0 not affected | CNA record |
Red Hat Red Hat Enterprise Linux 10 redhat:enterprise_linux | from 0:4.23.5-109.el10_2 not affected | CISA ADP |
Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support redhat:enterprise_linux_eus | from 0:4.21.3-114.el10_0.1 not affected | CISA ADP |
from 0:4.15.5-16.el8_6.1 not affected | CISA ADP | |
Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On redhat:rhel_eus_long_life | from 0:4.15.5-16.el8_6.1 not affected | CISA ADP |
from 0:4.17.5-7.el8_8.1 not affected | CISA ADP | |
from 0:4.17.5-7.el8_8.1 not affected | CISA ADP | |
Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support redhat:rhel_eus | from 0:4.21.3-14.el9_6.1 not affected | CISA ADP |
Red Hat Red Hat OpenShift Container Platform 4.12 redhat:openshift | from 412.86.202608241157-0 not affected; from 412.86.202609082051-0 not affected | CISA ADP |
redhat openshift_container_platform redhat:openshift_container_platform | 4.0 | NVD |
samba samba samba:samba | from 4.16.0 before 4.21.0 | NVD |
redhat enterprise_linux redhat:enterprise_linux | 7.0; 9.0 | NVD |
References
- https://access.redhat.com/errata/RHSA-2026:22644vendor-advisory, x-refsource-redhat, issue-tracking
- https://access.redhat.com/errata/RHSA-2026:22963vendor-advisory, x-refsource-redhat, issue-tracking
- https://access.redhat.com/errata/RHSA-2026:25049vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:25979vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:28053vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:28054vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:28055vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:28056vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:28057vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:29863vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:56786vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:56853vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:56911vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:57483vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:59831vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:60019vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:62409vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:62549vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:65839vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:65851vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:65907vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:67857vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:70586vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:77320vendor-advisory, x-refsource-redhat
- https://access.redhat.com/security/cve/CVE-2026-3012vdb-entry, x-refsource-redhat, mitigation, third-party-advisory
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