CVE-2026-16102

Estado: ModificadaAlta (8.1)—

A flaw was found in the Dynamic Client Registration (DCR) component of Keycloak, an identity and access management solution. The default DCR policy fails to properly validate the claim path for User Property mappers, allowing them to write values to sensitive internal claim locations. An attacker with a standard user account and a limited Initial Access Token can exploit this to forge administrative roles in their access token. This allows the attacker to take over other clients, steal confidential secrets, and potentially gain full administrative control over the realm.

CVSS

Versión: 3.1
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Puntuación base: 8.1

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 0.46%
Percentil entre todas las CVEs puntuadas: 38
Fecha de la puntuación: 5/10/2026

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

ExplotaciónT1210 Exploitation of Remote Serviceslateral movement92 %
Impacto principalT1078.002 Domain Accountsstealth · persistence · privilege escalation · initial access88 %
Impacto secundarioT1555.003 Credentials from Web Browserscredential access75 %
Impacto secundarioT1556.001 Domain Controller Authenticationdefense impairment · persistence · credential access82 %

Explotación de servicio remoto (Keycloak/DCR) requiere PR:L. Impactos: forja de tokens admin (T1078.002), robo de secretos de cliente (T1555.003), control administrativo vía modificación de IdP (T1556.001).

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

User Training Privileged Account Management User Account Management Password Policies Multi-factor Authentication Update Software

Tecnologías afectadas (4)

Redhat — Build OF Keycloak Redhat — Data Grid Redhat — Jboss Enterprise Application Platform Expansion Pack Redhat — Single Sign-on

CWE

CWE-551
CWE-284

Referencias

JSON original (NVD)

Mostrar

{
  "id": "CVE-2026-16102",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-16102",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-08-05T14:42:47.605535Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "secalert@redhat.com",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 8.1,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.2,
        "exploitabilityScore": 2.8
      }
    ]
  },
  "affected": [
    {
      "source": "secalert@redhat.com",
      "affectedData": [
        {
          "cpes": [
            "cpe:/a:redhat:build_keycloak:26.4::el9"
          ],
          "vendor": "Red Hat",
          "product": "Red Hat build of Keycloak 26.4",
          "versions": [
            {
              "status": "unaffected",
              "version": "26.4.14-1",
              "lessThan": "*",
              "versionType": "rpm"
            }
          ],
          "packageName": "rhbk/keycloak-operator-bundle",
          "collectionURL": "https://catalog.redhat.com/software/containers/",
          "defaultStatus": "affected"
        },
        {
          "cpes": [
            "cpe:/a:redhat:build_keycloak:26.4::el9"
          ],
          "vendor": "Red Hat",
          "product": "Red Hat build of Keycloak 26.4",
          "versions": [
            {
              "status": "unaffected",
              "version": "26.4-22",
              "lessThan": "*",
              "versionType": "rpm"
            }
          ],
          "packageName": "rhbk/keycloak-rhel9",
          "collectionURL": "https://catalog.redhat.com/software/containers/",
          "defaultStatus": "affected"
        },
        {
          "cpes": [
            "cpe:/a:redhat:build_keycloak:26.4::el9"
          ],
          "vendor": "Red Hat",
          "product": "Red Hat build of Keycloak 26.4",
          "versions": [
            {
              "status": "unaffected",
              "version": "26.4-22",
              "lessThan": "*",
              "versionType": "rpm"
            }
          ],
          "packageName": "rhbk/keycloak-rhel9-operator",
          "collectionURL": "https://catalog.redhat.com/software/containers/",
          "defaultStatus": "affected"
        },
        {
          "cpes": [
            "cpe:/a:redhat:build_keycloak:26.4::el9"
          ],
          "vendor": "Red Hat",
          "product": "Red Hat build of Keycloak 26.4.14",
          "packageName": "keycloak-services",
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "defaultStatus": "unaffected"
        },
        {
          "cpes": [
            "cpe:/a:redhat:build_keycloak:26.4::el9"
          ],
          "vendor": "Red Hat",
          "product": "Red Hat build of Keycloak 26.4.14",
          "packageName": "rhbk-openshift-rhel9/rhbk-openshift-rhel9",
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "defaultStatus": "unaffected"
        },
        {
          "cpes": [
            "cpe:/a:redhat:build_keycloak:26.6::el9"
          ],
          "vendor": "Red Hat",
          "product": "Red Hat build of Keycloak 26.6",
          "versions": [
            {
              "status": "unaffected",
              "version": "26.6.5-1",
              "lessThan": "*",
              "versionType": "rpm"
            }
          ],
          "packageName": "rhbk/keycloak-operator-bundle",
          "collectionURL": "https://catalog.redhat.com/software/containers/",
          "defaultStatus": "affected"
        },
        {
          "cpes": [
            "cpe:/a:redhat:build_keycloak:26.6::el9"
          ],
          "vendor": "Red Hat",
          "product": "Red Hat build of Keycloak 26.6",
          "versions": [
            {
              "status": "unaffected",
              "version": "26.6-11",
              "lessThan": "*",
              "versionType": "rpm"
            }
          ],
          "packageName": "rhbk/keycloak-rhel9",
          "collectionURL": "https://catalog.redhat.com/software/containers/",
          "defaultStatus": "affected"
        },
        {
          "cpes": [
            "cpe:/a:redhat:build_keycloak:26.6::el9"
          ],
          "vendor": "Red Hat",
          "product": "Red Hat build of Keycloak 26.6",
          "versions": [
            {
              "status": "unaffected",
              "version": "26.6-11",
              "lessThan": "*",
              "versionType": "rpm"
            }
          ],
          "packageName": "rhbk/keycloak-rhel9-operator",
          "collectionURL": "https://catalog.redhat.com/software/containers/",
          "defaultStatus": "affected"
        },
        {
          "cpes": [
            "cpe:/a:redhat:build_keycloak:26.6::el9"
          ],
          "vendor": "Red Hat",
          "product": "Red Hat build of Keycloak 26.6.5",
          "packageName": "keycloak-services",
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "defaultStatus": "unaffected"
        },
        {
          "cpes": [
            "cpe:/a:redhat:build_keycloak:26.6::el9"
          ],
          "vendor": "Red Hat",
          "product": "Red Hat build of Keycloak 26.6.5",
          "packageName": "rhbk-keycloak-rhel9/rhbk-keycloak-rhel9",
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "defaultStatus": "unaffected"
        },
        {
          "cpes": [
            "cpe:/a:redhat:build_keycloak:26.6::el9"
          ],
          "vendor": "Red Hat",
          "product": "Red Hat build of Keycloak 26.6.5",
          "packageName": "rhbk-openshift-rhel9/rhbk-openshift-rhel9",
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "defaultStatus": "unaffected"
        },
        {
          "cpes": [
            "cpe:/a:redhat:jboss_data_grid:8"
          ],
          "vendor": "Red Hat",
          "product": "Red Hat Data Grid 8",
          "packageName": "keycloak-services",
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "defaultStatus": "unaffected"
        },
        {
          "cpes": [
            "cpe:/a:redhat:jbosseapxp"
          ],
          "vendor": "Red Hat",
          "product": "Red Hat JBoss Enterprise Application Platform Expansion Pack",
          "packageName": "keycloak-services",
          "collectionURL": "https://access.redhat.com/jbossnetwork/restricted/listSoftware.html",
          "defaultStatus": "unaffected"
        },
        {
          "cpes": [
            "cpe:/a:redhat:red_hat_single_sign_on:7"
          ],
          "vendor": "Red Hat",
          "product": "Red Hat Single Sign-On 7",
          "packageName": "keycloak-services",
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-08-05T15:16:37.703",
  "references": [
    {
      "url": "https://access.redhat.com/errata/RHSA-2026:50846",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "secalert@redhat.com"
    },
    {
      "url": "https://access.redhat.com/errata/RHSA-2026:50847",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "secalert@redhat.com"
    },
    {
      "url": "https://access.redhat.com/errata/RHSA-2026:50848",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "secalert@redhat.com"
    },
    {
      "url": "https://access.redhat.com/errata/RHSA-2026:50849",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "secalert@redhat.com"
    },
    {
      "url": "https://access.redhat.com/security/cve/CVE-2026-16102",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "secalert@redhat.com"
    },
    {
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2501735",
      "tags": [
        "Issue Tracking"
      ],
      "source": "secalert@redhat.com"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "secalert@redhat.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-551"
        }
      ]
    },
    {
      "type": "Secondary",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "description": [
        {
          "lang": "en",
          "value": "CWE-284"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "A flaw was found in the Dynamic Client Registration (DCR) component of Keycloak, an identity and access management solution. The default DCR policy fails to properly validate the claim path for User Property mappers, allowing them to write values to sensitive internal claim locations. An attacker with a standard user account and a limited Initial Access Token can exploit this to forge administrative roles in their access token. This allows the attacker to take over other clients, steal confidential secrets, and potentially gain full administrative control over the realm."
    }
  ],
  "lastModified": "2026-08-31T12:17:54.960",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:redhat:build_of_keycloak:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "713779EF-1701-47D7-8232-95B8EC42F3F6",
              "versionEndExcluding": "26.4.14",
              "versionStartIncluding": "26.4"
            },
            {
              "criteria": "cpe:2.3:a:redhat:build_of_keycloak:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "39CFDE24-0907-4B79-89FB-BB7CDC839597",
              "versionEndExcluding": "26.6.5",
              "versionStartIncluding": "26.6"
            },
            {
              "criteria": "cpe:2.3:a:redhat:data_grid:8.0:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "7095200A-4DAC-4433-99E8-86CA88E1E4D4"
            },
            {
              "criteria": "cpe:2.3:a:redhat:jboss_enterprise_application_platform_expansion_pack:-:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "0A24CBFB-4900-47A5-88D2-A44C929603DC"
            },
            {
              "criteria": "cpe:2.3:a:redhat:single_sign-on:7.0:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "9EFEC7CA-8DDA-48A6-A7B6-1F1D14792890"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "secalert@redhat.com"
}