CVE-2026-37982

{
  "id": "CVE-2026-37982",
  "sourceIdentifier": "[email protected]",
  "published": "2026-05-19T12:16:18.610",
  "lastModified": "2026-10-29T10:17:05.370",
  "vulnStatus": "Modified",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A flaw was found in Keycloak. This authentication vulnerability allows a remote attacker to replay `ExecuteActionsActionToken` tokens within Keycloak's WebAuthn (Web Authentication) flow. By intercepting an execute-actions email link, an attacker can register their own authenticator to a victim's account. This leads to unauthorized enrollment of a hardware-backed credential, enabling persistent account takeover."
    },
    {
      "lang": "es",
      "value": "Se encontró un fallo en Keycloak. Esta vulnerabilidad de autenticación permite a un atacante remoto reproducir tokens ’ExecuteActionsActionToken’ dentro del flujo WebAuthn (Autenticación Web) de Keycloak. Al interceptar un enlace de correo electrónico de ’execute-actions’, un atacante puede registrar su propio autenticador en la cuenta de una víctima. Esto conduce al registro no autorizado de una credencial respaldada por hardware, lo que permite una toma de control persistente de la cuenta."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "Red Hat",
          "product": "Red Hat build of Keycloak 26.4",
          "defaultStatus": "affected",
          "collectionURL": "https://catalog.redhat.com/software/containers/",
          "packageName": "rhbk/keycloak-operator-bundle",
          "cpes": [
            "cpe:/a:redhat:build_keycloak:26.4::el9"
          ],
          "versions": [
            {
              "version": "26.4.12-1",
              "lessThan": "*",
              "versionType": "rpm",
              "status": "unaffected"
            }
          ]
        },
        {
          "vendor": "Red Hat",
          "product": "Red Hat build of Keycloak 26.4",
          "defaultStatus": "affected",
          "collectionURL": "https://catalog.redhat.com/software/containers/",
          "packageName": "rhbk/keycloak-rhel9",
          "cpes": [
            "cpe:/a:redhat:build_keycloak:26.4::el9"
          ],
          "versions": [
            {
              "version": "26.4-17",
              "lessThan": "*",
              "versionType": "rpm",
              "status": "unaffected"
            }
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        },
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            {
              "version": "26.4-17",
              "lessThan": "*",
              "versionType": "rpm",
              "status": "unaffected"
            }
          ]
        },
        {
          "vendor": "Red Hat",
          "product": "Red Hat build of Keycloak 26.4.12",
          "defaultStatus": "unaffected",
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "packageName": "rhbk/keycloak-rhel9",
          "cpes": [
            "cpe:/a:redhat:build_keycloak:26.4::el9"
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
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        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N",
          "baseScore": 6.8,
          "baseSeverity": "MEDIUM",
          "attackVector": "NETWORK",
          "attackComplexity": "HIGH",
          "privilegesRequired": "NONE",
          "userInteraction": "REQUIRED",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "availabilityImpact": "NONE"
        },
        "exploitabilityScore": 1.6,
        "impactScore": 5.2
      }
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        "ssvcData": {
          "timestamp": "2026-05-19T13:37:29.663865Z",
          "id": "CVE-2026-37982",
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          "role": "CISA Coordinator",
          "version": "2.0.3"
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  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Primary",
      "description": [
        {
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          "value": "CWE-294"
        }
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  "references": [
    {
      "url": "https://access.redhat.com/errata/RHSA-2026:19596",
      "source": "[email protected]",
      "tags": [
        "Vendor Advisory"
      ]
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      "url": "https://access.redhat.com/errata/RHSA-2026:19597",
      "source": "[email protected]",
      "tags": [
        "Vendor Advisory"
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    },
    {
      "url": "https://access.redhat.com/security/cve/CVE-2026-37982",
      "source": "[email protected]",
      "tags": [
        "Vendor Advisory"
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    },
    {
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2455329",
      "source": "[email protected]",
      "tags": [
        "Vendor Advisory"
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    }
  ]
}