FKIE_CVE-2026-0871

Vulnerability from fkie_nvd - Published: 2026-02-27 08:17 - Updated: 2026-03-05 02:03
Severity ?
4.9 (Medium) - CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N
Summary
A flaw was found in Keycloak. An administrator with `manage-users` permission can bypass the "Only administrators can view" setting for unmanaged attributes, allowing them to modify these attributes. This improper access control can lead to unauthorized changes to user profiles, even when the system is configured to restrict such modifications.
References
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2026:2365Vendor Advisory
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2026:2366Vendor Advisory
secalert@redhat.comhttps://access.redhat.com/security/cve/CVE-2026-0871Vendor Advisory
secalert@redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=2428881Issue Tracking, Vendor Advisory
Impacted products
Vendor Product Version
redhat build_of_keycloak *
redhat build_of_keycloak -
redhat keycloak *
To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:redhat:build_of_keycloak:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "FEA48695-84DD-43C9-A163-38507A9A6582",
              "versionEndExcluding": "26.4.9",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:redhat:build_of_keycloak:-:*:*:*:text-only:*:*:*",
              "matchCriteriaId": "1830E455-7E11-4264-862D-05971A42D4A6",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:redhat:keycloak:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "1882E42C-6B1E-4E64-A8A9-28FE4DE7768E",
              "versionEndExcluding": "26.4.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A flaw was found in Keycloak. An administrator with `manage-users` permission can bypass the \"Only administrators can view\" setting for unmanaged attributes, allowing them to modify these attributes. This improper access control can lead to unauthorized changes to user profiles, even when the system is configured to restrict such modifications."
    },
    {
      "lang": "es",
      "value": "Se encontr\u00f3 una vulnerabilidad en Keycloak. Un administrador con permiso \u0027manage-users\u0027 puede eludir la configuraci\u00f3n \u0027Solo los administradores pueden ver\u0027 para atributos no gestionados, permiti\u00e9ndoles modificar estos atributos. Este control de acceso inadecuado puede llevar a cambios no autorizados en los perfiles de usuario, incluso cuando el sistema est\u00e1 configurado para restringir dichas modificaciones."
    }
  ],
  "id": "CVE-2026-0871",
  "lastModified": "2026-03-05T02:03:32.580",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 4.9,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "HIGH",
          "privilegesRequired": "HIGH",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 1.2,
        "impactScore": 3.6,
        "source": "secalert@redhat.com",
        "type": "Primary"
      }
    ]
  },
  "published": "2026-02-27T08:17:09.410",
  "references": [
    {
      "source": "secalert@redhat.com",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://access.redhat.com/errata/RHSA-2026:2365"
    },
    {
      "source": "secalert@redhat.com",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://access.redhat.com/errata/RHSA-2026:2366"
    },
    {
      "source": "secalert@redhat.com",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://access.redhat.com/security/cve/CVE-2026-0871"
    },
    {
      "source": "secalert@redhat.com",
      "tags": [
        "Issue Tracking",
        "Vendor Advisory"
      ],
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2428881"
    }
  ],
  "sourceIdentifier": "secalert@redhat.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-266"
        }
      ],
      "source": "secalert@redhat.com",
      "type": "Primary"
    },
    {
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.