---
id: CVE-2026-90462
title: A flaw was found in SSSD
summary: >-
  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.
  Thi…
severity: medium
cvss: 5.4
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N'
cwe:
  - CWE-280
vendor: Red Hat
product: sssd
affected:
  - sssd (all versions)
  - sssd
  - sssd (all versions)
  - sssd (all versions)
  - sssd (all versions)
  - openshift/ose-rhel-coreos-8 (all versions)
  - openshift/ose-rhel-coreos-9 (all versions)
published: '2026-09-22'
updated: '2026-09-22'
sourceUpdated: '2026-09-22T19:37:36.747'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-90462'
references:
  - url: 'https://access.redhat.com/security/cve/CVE-2026-90462'
    label: secalert@redhat.com
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2479483'
    label: secalert@redhat.com
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2479483'
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-90462.json
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-90462'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-90462'
tags:
  - nvd
  - cve.org
  - exploit-available
  - csaf
  - vex
  - red-hat
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-22T17:24:05.615734Z'
ingestedAt: '2026-09-22T16:06:00.474Z'
epss: 0.0021
epssPercentile: 0.10046
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Vendor advisories

- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, … · updated 2026-09-22 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-90462.json)