CVE-2026-7571

{
  "id": "CVE-2026-7571",
  "sourceIdentifier": "[email protected]",
  "published": "2026-05-19T12:16:19.820",
  "lastModified": "2026-10-26T13:10:00.140",
  "vulnStatus": "Analyzed",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A flaw was found in Keycloak. A low-privilege user, with knowledge of user credentials and client ID, can bypass a security control intended to disable the implicit flow in OpenID Connect (OIDC) clients. By manipulating client data during a session restart, an attacker can obtain an access token that should not be available. This vulnerability can also lead to the exposure of these access tokens in server logs, proxy logs, and HTTP Referrer headers, resulting in sensitive information disclosure."
    },
    {
      "lang": "es",
      "value": "Una falla fue encontrada en Keycloak. Un usuario de bajo privilegio, con conocimiento de las credenciales de usuario y el ID de cliente, puede eludir un control de seguridad destinado a deshabilitar el flujo implícito en clientes de OpenID Connect (OIDC). Al manipular datos del cliente durante un reinicio de sesión, un atacante puede obtener un token de acceso que no debería estar disponible. Esta vulnerabilidad también puede llevar a la exposición de estos tokens de acceso en registros del servidor, registros de proxy y encabezados HTTP Referrer, lo que resulta en revelación de información sensible."
    }
  ],
  "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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          "product": "Red Hat build of Keycloak 26.4",
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          "packageName": "rhbk/keycloak-rhel9-operator",
          "cpes": [
            "cpe:/a:redhat:build_keycloak:26.4::el9"
          ],
          "versions": [
            {
              "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-operator",
          "cpes": [
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          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N",
          "baseScore": 7.1,
          "baseSeverity": "HIGH",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "LOW",
          "availabilityImpact": "NONE"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 4.2
      }
    ],
    "ssvcV203": [
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        "ssvcData": {
          "timestamp": "2026-05-19T11:57:40.751926Z",
          "id": "CVE-2026-7571",
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            },
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          "role": "CISA Coordinator",
          "version": "2.0.3"
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  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-472"
        }
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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-2026-7571",
      "source": "[email protected]",
      "tags": [
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    },
    {
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2464263",
      "source": "[email protected]",
      "tags": [
        "Vendor Advisory"
      ]
    }
  ]
}