{
  "threat_severity" : "Important",
  "public_date" : "2026-04-02T12:30:00Z",
  "bugzilla" : {
    "description" : "keycloak: Keycloak: Privilege escalation via forged authorization codes due to SingleUseObjectProvider isolation flaw",
    "id" : "2448061",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2448061"
  },
  "cvss3" : {
    "cvss3_base_score" : "7.4",
    "cvss3_scoring_vector" : "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
    "status" : "verified"
  },
  "cwe" : "CWE-653",
  "details" : [ "A flaw was found in Keycloak. The SingleUseObjectProvider, a global key-value store, lacks proper type and namespace isolation. This vulnerability allows an unauthenticated attacker to forge authorization codes. Successful exploitation can lead to the creation of admin-capable access tokens, resulting in privilege escalation.", "A flaw was found in Keycloak. The SingleUseObjectProvider, a global key-value store, lacks proper type and namespace isolation. This vulnerability allows an unauthenticated attacker to forge authorization codes. Successful exploitation can lead to the creation of admin-capable access tokens, resulting in privilege escalation." ],
  "statement" : "This is an IMPORTANT vulnerability in Keycloak. An unauthenticated attacker can exploit a lack of type and namespace isolation in Keycloak's SingleUseObjectProvider to forge authorization codes and obtain admin-capable access tokens. This could lead to unauthorized administrative access within affected Keycloak deployments.",
  "acknowledgement" : "Red Hat would like to thank chungkn (OneMount Group) for reporting this issue.",
  "affected_release" : [ {
    "product_name" : "Red Hat build of Keycloak 26.2",
    "release_date" : "2026-04-02T00:00:00Z",
    "advisory" : "RHSA-2026:6476",
    "cpe" : "cpe:/a:redhat:build_keycloak:26.2::el9",
    "package" : "rhbk/keycloak-operator-bundle:26.2.15-1"
  }, {
    "product_name" : "Red Hat build of Keycloak 26.2",
    "release_date" : "2026-04-02T00:00:00Z",
    "advisory" : "RHSA-2026:6476",
    "cpe" : "cpe:/a:redhat:build_keycloak:26.2::el9",
    "package" : "rhbk/keycloak-rhel9:26.2-18"
  }, {
    "product_name" : "Red Hat build of Keycloak 26.2",
    "release_date" : "2026-04-02T00:00:00Z",
    "advisory" : "RHSA-2026:6476",
    "cpe" : "cpe:/a:redhat:build_keycloak:26.2::el9",
    "package" : "rhbk/keycloak-rhel9-operator:26.2-18"
  }, {
    "product_name" : "Red Hat build of Keycloak 26.2.15",
    "release_date" : "2026-04-02T00:00:00Z",
    "advisory" : "RHSA-2026:6475",
    "cpe" : "cpe:/a:redhat:build_keycloak:26.2::el9",
    "package" : "rhbk/keycloak-rhel9"
  }, {
    "product_name" : "Red Hat build of Keycloak 26.4",
    "release_date" : "2026-04-02T00:00:00Z",
    "advisory" : "RHSA-2026:6478",
    "cpe" : "cpe:/a:redhat:build_keycloak:26.4::el9",
    "package" : "rhbk/keycloak-operator-bundle:26.4.11-1"
  }, {
    "product_name" : "Red Hat build of Keycloak 26.4",
    "release_date" : "2026-04-02T00:00:00Z",
    "advisory" : "RHSA-2026:6478",
    "cpe" : "cpe:/a:redhat:build_keycloak:26.4::el9",
    "package" : "rhbk/keycloak-rhel9:26.4-14"
  }, {
    "product_name" : "Red Hat build of Keycloak 26.4",
    "release_date" : "2026-04-02T00:00:00Z",
    "advisory" : "RHSA-2026:6478",
    "cpe" : "cpe:/a:redhat:build_keycloak:26.4::el9",
    "package" : "rhbk/keycloak-rhel9-operator:26.4-14"
  }, {
    "product_name" : "Red Hat build of Keycloak 26.4.11",
    "release_date" : "2026-04-02T00:00:00Z",
    "advisory" : "RHSA-2026:6477",
    "cpe" : "cpe:/a:redhat:build_keycloak:26.4::el9",
    "package" : "rhbk/keycloak-rhel9"
  } ],
  "references" : [ "https://www.cve.org/CVERecord?id=CVE-2026-4282\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-4282" ],
  "name" : "CVE-2026-4282",
  "mitigation" : {
    "value" : "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.",
    "lang" : "en:us"
  },
  "csaw" : false
}