NVD

CVE-2026-3012 Detail

Modified After Enrichment

This CVE record has been updated after NVD enrichment efforts were completed. Enrichment data supplied by the NVD may require amendment due to these changes.

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.

Metrics

NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.

CVSS 4.0 Severity and Vector Strings:

NIST: NVD

N/A

NVD assessment not yet provided.

CVSS 3.x Severity and Vector Strings:

NIST: NVD

Base Score: 6.8 MEDIUM

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

Nist CVSS score does not match with CNA score

CNA: Red Hat, Inc.

Base Score: 8.0 HIGH

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

CVSS 2.0 Severity and Vector Strings:

National Institute of Standards and Technology

NIST: NVD

Base Score: N/A

NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://access.redhat.com/errata/RHSA-2026:22644	Red Hat, Inc.	Issue Tracking
https://access.redhat.com/errata/RHSA-2026:22963	Red Hat, Inc.	Issue Tracking
https://access.redhat.com/errata/RHSA-2026:25049	Red Hat, Inc.
https://access.redhat.com/errata/RHSA-2026:25979	Red Hat, Inc.
https://access.redhat.com/security/cve/CVE-2026-3012	Red Hat, Inc.	Mitigation Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2447319	Red Hat, Inc.	Issue Tracking Third Party Advisory
https://bugzilla.samba.org/show_bug.cgi?id=16003	Red Hat, Inc.	Issue Tracking Mitigation Vendor Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-345	Insufficient Verification of Data Authenticity	Red Hat, Inc.

Known Affected Software Configurations Switch to CPE 2.2

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Change History

8 change records found show changes

Reanalysis by NIST 6/08/2026 10:59:06 AM

Action

Type

Old Value

New Value

Changed

CPE Configuration

OR
          *cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*
          *cpe:2.3:a:redhat:openshift_container_platform:4.0:*:*:*:*:*:*:*
          *cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*
          *cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:* versions from (including) 4.1.0

OR
          *cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*
          *cpe:2.3:a:redhat:openshift_container_platform:4.0:*:*:*:*:*:*:*
          *cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*
          *cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:* versions from (including) 4.16.0 up to (excluding) 4.21.0

Changed

Reference Type

Red Hat, Inc.: https://access.redhat.com/security/cve/CVE-2026-3012 Types: Mitigation, Vendor Advisory

Red Hat, Inc.: https://access.redhat.com/security/cve/CVE-2026-3012 Types: Mitigation, Third Party Advisory

Changed

Reference Type

Red Hat, Inc.: https://bugzilla.redhat.com/show_bug.cgi?id=2447319 Types: Issue Tracking, Vendor Advisory

Red Hat, Inc.: https://bugzilla.redhat.com/show_bug.cgi?id=2447319 Types: Issue Tracking, Third Party Advisory

Initial Analysis by NIST 6/08/2026 10:53:34 AM

Action	Type	New Value
Added	CVSS V3.1	AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Added	CPE Configuration	OR cpe:2.3:o:redhat:enterprise_linux:7.0::::::: cpe:2.3:a:redhat:openshift_container_platform:4.0::::::: cpe:2.3:o:redhat:enterprise_linux:9.0::::::: cpe:2.3:a:samba:samba::::::::* versions from (including) 4.1.0
Added	Reference Type	Red Hat, Inc.: https://access.redhat.com/errata/RHSA-2026:22644 Types: Issue Tracking
Added	Reference Type	Red Hat, Inc.: https://access.redhat.com/errata/RHSA-2026:22963 Types: Issue Tracking
Added	Reference Type	Red Hat, Inc.: https://access.redhat.com/security/cve/CVE-2026-3012 Types: Mitigation, Vendor Advisory
Added	Reference Type	Red Hat, Inc.: https://bugzilla.redhat.com/show_bug.cgi?id=2447319 Types: Issue Tracking, Vendor Advisory
Added	Reference Type	Red Hat, Inc.: https://bugzilla.samba.org/show_bug.cgi?id=16003 Types: Issue Tracking, Mitigation, Vendor Advisory

Quick Info

CVE Dictionary Entry:
CVE-2026-3012
NVD Published Date:
05/27/2026
NVD Last Modified:
06/15/2026
Source:
Red Hat, Inc.

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Information Technology Laboratory

National Vulnerability Database

National Vulnerability Database

CVE-2026-3012 Detail

Description

Metrics

References to Advisories, Solutions, and Tools

Weakness Enumeration

Known Affected Software Configurations Switch to CPE 2.2

CPEs loading, please wait.

Change History

CVE Modified by Red Hat, Inc. 6/15/2026 6:16:16 PM

CVE Modified by Red Hat, Inc. 6/10/2026 12:17:03 PM

Reanalysis by NIST 6/08/2026 10:59:06 AM

Initial Analysis by NIST 6/08/2026 10:53:34 AM

CVE Modified by Red Hat, Inc. 6/03/2026 8:16:59 PM

CVE Modified by Red Hat, Inc. 6/03/2026 2:16:32 AM

CVE Modified by Red Hat, Inc. 5/27/2026 8:17:08 AM

New CVE Received from Red Hat, Inc. 5/27/2026 7:16:18 AM

Quick Info