{
  "threat_severity" : "Moderate",
  "public_date" : "2026-05-19T05:00:04Z",
  "bugzilla" : {
    "description" : "keycloak: org.keycloak/keycloak-services: Keycloak: Policy bypass during WebAuthn credential registration via client-side JavaScript manipulation",
    "id" : "2479565",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2479565"
  },
  "cvss3" : {
    "cvss3_base_score" : "4.3",
    "cvss3_scoring_vector" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N",
    "status" : "verified"
  },
  "cwe" : "CWE-603",
  "details" : [ "A flaw was found in Keycloak. An authenticated user can bypass configured WebAuthn policies during credential registration by manipulating client-side JavaScript. This occurs because the server-side processAction() fails to validate that the newly created credential's parameters, such as public key algorithms, match the realm's configured WebAuthn policies. This could lead to the creation of credentials that do not adhere to administrative security requirements, potentially weakening the overall security posture of the system by allowing non-compliant authentication methods.", "A flaw was found in Keycloak. An authenticated user can bypass configured WebAuthn policies during credential registration by manipulating client-side JavaScript. This occurs because the server-side processAction() fails to validate that the newly created credential's parameters, such as public key algorithms, match the realm's configured WebAuthn policies. This could lead to the creation of credentials that do not adhere to administrative security requirements, potentially weakening the overall security posture of the system by allowing non-compliant authentication methods." ],
  "statement" : "A Moderate security flaw was found in Keycloak's WebAuthn credential registration process. This issue allows an authenticated attacker to bypass configured WebAuthn policies, such as algorithm requirements or user verification, by manipulating client-side JavaScript during registration. This bypass could lead to the registration of credentials that do not meet the intended security standards, potentially weakening the overall authentication posture.",
  "acknowledgement" : "Red Hat would like to thank Martin Bartoš (RedHat) for reporting this issue.",
  "affected_release" : [ {
    "product_name" : "Red Hat build of Keycloak 26.4",
    "release_date" : "2026-06-25T00:00:00Z",
    "advisory" : "RHSA-2026:30050",
    "cpe" : "cpe:/a:redhat:build_keycloak:26.4::el9",
    "package" : "rhbk/keycloak-operator-bundle:26.4.13-1"
  }, {
    "product_name" : "Red Hat build of Keycloak 26.4",
    "release_date" : "2026-06-25T00:00:00Z",
    "advisory" : "RHSA-2026:30050",
    "cpe" : "cpe:/a:redhat:build_keycloak:26.4::el9",
    "package" : "rhbk/keycloak-rhel9:26.4-19"
  }, {
    "product_name" : "Red Hat build of Keycloak 26.4",
    "release_date" : "2026-06-25T00:00:00Z",
    "advisory" : "RHSA-2026:30050",
    "cpe" : "cpe:/a:redhat:build_keycloak:26.4::el9",
    "package" : "rhbk/keycloak-rhel9-operator:26.4-19"
  }, {
    "product_name" : "Red Hat build of Keycloak 26.4.13",
    "release_date" : "2026-06-25T00:00:00Z",
    "advisory" : "RHSA-2026:30049",
    "cpe" : "cpe:/a:redhat:build_keycloak:26.4::el9",
    "package" : "rhbk/keycloak-rhel9-operator"
  }, {
    "product_name" : "Red Hat build of Keycloak 26.6",
    "release_date" : "2026-06-10T00:00:00Z",
    "advisory" : "RHSA-2026:25097",
    "cpe" : "cpe:/a:redhat:build_keycloak:26.6::el9",
    "package" : "rhbk/keycloak-operator-bundle:26.6.3-3"
  }, {
    "product_name" : "Red Hat build of Keycloak 26.6",
    "release_date" : "2026-06-10T00:00:00Z",
    "advisory" : "RHSA-2026:25097",
    "cpe" : "cpe:/a:redhat:build_keycloak:26.6::el9",
    "package" : "rhbk/keycloak-rhel9:26.6-6"
  }, {
    "product_name" : "Red Hat build of Keycloak 26.6",
    "release_date" : "2026-06-10T00:00:00Z",
    "advisory" : "RHSA-2026:25097",
    "cpe" : "cpe:/a:redhat:build_keycloak:26.6::el9",
    "package" : "rhbk/keycloak-rhel9-operator:26.6-6"
  }, {
    "product_name" : "Red Hat build of Keycloak 26.6.3",
    "release_date" : "2026-06-10T00:00:00Z",
    "advisory" : "RHSA-2026:25098",
    "cpe" : "cpe:/a:redhat:build_keycloak:26.6::el9",
    "package" : "rhbk/keycloak-rhel9-operator"
  } ],
  "references" : [ "https://www.cve.org/CVERecord?id=CVE-2026-8830\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-8830" ],
  "name" : "CVE-2026-8830",
  "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
}