What’s Vulnerable › Vulnerabilities

CVE-2026-90462: Sssd: sssd: fail-open in ldap ppolicy access check allows continued authorization

• Severity: medium (CVSS 5.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-09-22 · updated 2026-10-07
• Weakness: CWE-280

Description

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.

Affected products

• [UNKNOWN] sssd: 2.12.0
• Red Hat Enterprise Linux: 7.0, 8.0, 9.0, 10.0
• Red Hat OpenShift Container Platform 4.18: 4.0

References

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

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