CVE-2026-58222 Samba: samba ad ldap compare filter injection and trusted-request confusion disclose protected attributes
Authenticated users can inject LDAP filters to bypass ACLs and disclose protected Active Directory attributes, potentially leading to privilege escalation.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-58222?
CVE-2026-58222 is a high-severity vulnerability in Red Hat Enterprise Linux 10, published on 30 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Weakness: CWE-90
Which versions are affected by CVE-2026-58222?
How do I fix CVE-2026-58222?
Apply the vendor's patch.
Is CVE-2026-58222 being exploited?
There is no known exploitation of CVE-2026-58222 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Sources
Also known as AZL-94175, DEBIAN-CVE-2026-58222, ECHO-166a-43f5-1c18, GHSA-fcqv-6jgj-4xxc, UBUNTU-CVE-2026-58222.