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CVE-2026-90462

Full vulnerability record from the local CVENow database.

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.

Severity
MEDIUM
CVSS score
5.4 (v3.1)
Vulnerability status
Analyzed
Source identifier
Published
2026-09-22 16:18:08.137000
Last modified
2026-11-06 02:17:56.490000
View original CVE JSON
{
  "id": "CVE-2026-90462",
  "sourceIdentifier": "[email protected]",
  "published": "2026-09-22T16:18:08.137",
  "lastModified": "2026-11-06T02:17:56.490",
  "vulnStatus": "Analyzed",
  "cveTags": [],
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      "value": "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": [
    {
      "source": "[email protected]",
      "affectedData": [
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          "product": "Red Hat Enterprise Linux 10",
          "defaultStatus": "affected",
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "packageName": "sssd",
          "cpes": [
            "cpe:/a:redhat:enterprise_linux:10"
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        },
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          "vendor": "Red Hat",
          "product": "Red Hat Enterprise Linux 6",
          "defaultStatus": "unknown",
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          "packageName": "sssd",
          "cpes": [
            "cpe:/o:redhat:rhel_els:6"
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        },
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          "product": "Red Hat Enterprise Linux 7",
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          "packageName": "sssd",
          "cpes": [
            "cpe:/o:redhat:rhel_els:7"
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          "product": "Red Hat Enterprise Linux 8",
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          "vendor": "Red Hat",
          "product": "Red Hat OpenShift Container Platform 5",
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          "cpes": [
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  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N",
          "baseScore": 5.4,
          "baseSeverity": "MEDIUM",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "availabilityImpact": "NONE"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 2.5
      }
    ],
    "ssvcV203": [
      {
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        "ssvcData": {
          "timestamp": "2026-09-22T17:24:05.615734Z",
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          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
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          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
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  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-280"
        }
      ]
    }
  ],
  "configurations": [
    {
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        {
          "operator": "OR",
          "negate": false,
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}