CVE-2026-90462

A flaw was found in SSSD. When configured with the LDAP access provider and `ldap_access_order` including `ppolicy` or `lockout`, a fail-open condition in the LDAP ppolicy access check can occur if a user lookup returns zero results. This can incorrectly return success and cache an allow decision, permitting continued authorization for a deleted or deprovisioned user. A remote attacker with prior valid account context could exploit this to maintain access to information and potentially make limited modifications to resources that should no longer be available.

• https://access.redhat.com/security/cve/CVE-2026-90462Vendor Advisory
• https://bugzilla.redhat.com/show_bug.cgi?id=2479483Exploit
• https://bugzilla.redhat.com/show_bug.cgi?id=2479483Exploit