Vulnerability Description
A security flaw combining LDAP filter injection and improper authorization checks was found in Samba Active Directory Domain Controller (AD DC). When processing LDAP Compare requests, Samba fails to properly validate user-supplied attribute names and executes the resulting internal database search in a trusted context, bypassing normal Access Control List (ACL) enforcement. An authenticated low-privilege domain user can exploit these flaws to disclose confidential Active Directory attributes that would normally be inaccessible. The disclosed information may be leveraged to derive sensitive authentication material, potentially leading to privilege escalation and complete domain compromise. For example: In deployments configured with Group Managed Service Accounts (gMSAs), an attacker can extract the "msKds-RootKeyData" attribute and derive gMSA passwords offline, potentially leading to complete domain compromise if privileged gMSAs are present.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://access.redhat.com/security/cve/CVE-2026-58222
- https://bugzilla.redhat.com/show_bug.cgi?id=2502722
- https://bugzilla.samba.org/show_bug.cgi?id=16148
- https://www.samba.org/samba/security/CVE-2026-58222.html
FAQ
What is CVE-2026-58222?
CVE-2026-58222 is a vulnerability with a CVSS score of 8.8 (HIGH). A security flaw combining LDAP filter injection and improper authorization checks was found in Samba Active Directory Domain Controller (AD DC). When processing LDAP Compare requests, Samba fails to p...
How severe is CVE-2026-58222?
CVE-2026-58222 has been rated HIGH with a CVSS base score of 8.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-58222?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.