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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.

PUBLISHED Reserved 2026-02-23 | Published 2026-05-27 | Updated 2026-05-27 | Assigner redhat




HIGH: 8.0CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N

Problem types

Insufficient Verification of Data Authenticity

Product status

Default status
affected

Default status
unknown

Default status
unknown

Default status
affected

Default status
affected

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affected

Default status
affected

Timeline

2026-03-13:Reported to Red Hat.
2026-05-27:Made public.

References

access.redhat.com/security/cve/CVE-2026-3012 vdb-entry

bugzilla.redhat.com/show_bug.cgi?id=2447319 (RHBZ#2447319) issue-tracking

bugzilla.samba.org/show_bug.cgi?id=16003

cve.org (CVE-2026-3012)

nvd.nist.gov (CVE-2026-3012)

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