Samba: group policy certificate enrollment uses http:// without validation

Summary

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.

Timeline

1. May 27, 2026, 12:00 AM UTCCISA SSVC assessment

   Exploitation: none · Automatable: no · Technical impact: total

2. May 27, 2026, 10:02 AM UTCCVE published
3. Oct 15, 2026, 4:40 PM UTCRecord last updated

Affected versions

• samba

  Version range not reported

• samba

  Version range not reported

• samba

  Version range not reported

• samba

  Version range not reported

• samba

  Version range not reported

• samba

  Version range not reported

• samba

  Version range not reported

• samba

  Version range not reported

• samba

  Version range not reported

• samba

  Version range not reported

• samba

  Version range not reported

• openshift/ose-rhel-coreos-8

  Version range not reported

• openshift/ose-rhel-coreos-9

  Version range not reported

• openshift/ose-rhel-coreos-9

  Version range not reported

• openshift/ose-rhel-coreos-9

  Version range not reported

• openshift/ose-rhel-coreos-9

  Version range not reported

• openshift/ose-rhel-coreos-9

  Version range not reported

• openshift/ose-rhel-coreos-9

  Version range not reported

• openshift/ose-rhel-coreos-9

  Version range not reported

• samba

  Version range not reported

• samba4

  Version range not reported

• samba

  Version range not reported

References 25