GHSA-33J3-G875-37RP

Vulnerability from github – Published: 2026-05-28 06:31 – Updated: 2026-07-01 21:22
VLAI
Summary
Keycloak Vulnerable to Improper Handling of Insufficient Permissions or Privilege
Details

A flaw was found in Keycloak's Client Policies, specifically within the org.keycloak.protocol.oidc component. When certain condition providers (client-type, client-roles, client-attributes, client-scopes) are used to enforce security restrictions, the reject-ropc-grant executor is silently bypassed. This allows an unauthenticated remote attacker to obtain tokens via a Resource Owner Password Credentials (ROPC) grant, even when a policy is explicitly configured to block it. This bypass can lead to unauthorized access and information disclosure.

Severity
6.5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Show details on source website
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{
  "affected": [
    {
      "package": {
        "ecosystem": "Maven",
        "name": "org.keycloak:keycloak-services"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "26.5.0"
            },
            {
              "fixed": "26.6.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Maven",
        "name": "org.keycloak:keycloak-services"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "26.4.7"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-9792"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-280"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-07-01T21:22:38Z",
    "nvd_published_at": "2026-05-28T05:16:40Z",
    "severity": "MODERATE"
  },
  "details": "A flaw was found in Keycloak\u0027s Client Policies, specifically within the `org.keycloak.protocol.oidc` component. When certain condition providers (client-type, client-roles, client-attributes, client-scopes) are used to enforce security restrictions, the `reject-ropc-grant` executor is silently bypassed. This allows an unauthenticated remote attacker to obtain tokens via a Resource Owner Password Credentials (ROPC) grant, even when a policy is explicitly configured to block it. This bypass can lead to unauthorized access and information disclosure.",
  "id": "GHSA-33j3-g875-37rp",
  "modified": "2026-07-01T21:22:38Z",
  "published": "2026-05-28T06:31:09Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-9792"
    },
    {
      "type": "WEB",
      "url": "https://github.com/keycloak/keycloak/issues/49436"
    },
    {
      "type": "WEB",
      "url": "https://github.com/keycloak/keycloak/pull/49636"
    },
    {
      "type": "WEB",
      "url": "https://github.com/keycloak/keycloak/pull/49637"
    },
    {
      "type": "WEB",
      "url": "https://github.com/keycloak/keycloak/commit/13622ee0ffed91fd07ef444be2c858a7f356766d"
    },
    {
      "type": "WEB",
      "url": "https://github.com/keycloak/keycloak/commit/2af73c16a4e49333779bb34bce65461d9af036a4"
    },
    {
      "type": "WEB",
      "url": "https://github.com/keycloak/keycloak/commit/af5e3e8c60842bc1f3a78e6be414fe303f93163d"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:25097"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:25098"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:30049"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:30050"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/security/cve/CVE-2026-9792"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2482459"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/keycloak/keycloak"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Keycloak Vulnerable to Improper Handling of Insufficient Permissions or Privilege"
}



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