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Vulnerability record · CVE-2026-90462 · published 22 September 2026

CVE-2026-90462: Fedoraproject sssd vulnerability

Fedoraproject · Sssd

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.

5.4 CVSS 3.1 Medium EPSS 0.18% · top 93.0% CWE-280 · CWE-280
5.4CVSS 3.1 base score
0.18%EPSS exploitation probability, 30 days
NoNot in CISA KEV
3Affected product versions listed by NVD
3References, 2 tagged exploit
7 Oct 2026Last modified by NVD

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.

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

Affected products

3 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

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

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Source: NIST National Vulnerability Database (record CVE-2026-90462), CISA KEV, FIRST EPSS (scores of 2026-10-11). This page is refreshed as NVD updates the record.