CVE-2026-15556

Estado: Pendiente de análisisAlta (8.1)—
A flaw was found in Picketlink's SP signature validation; a SAML response containing zero assertion elements matching the signature check can allow an attacker to forge a SAML response and auth as any principal with any roles on the protected application.
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: 0.24%
Percentil entre todas las CVEs puntuadas: 14
Fecha de la puntuación: 6/10/2026
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 movement85 %
Impacto principalT1078.002 Domain Accountsstealth · persistence · privilege escalation · initial access90 %
Impacto secundarioT1556.003 Pluggable Authentication Modulesdefense impairment · persistence · credential access75 %
AV:N/PR:L implica explotación de servicio remoto con privilegios. El atacante forja respuestas SAML para autenticarse como cualquier principal (T1078.002: compromiso de cuenta válida) y obtener roles arbitrarios (T1556.003: manipulación de servicios de autenticación).
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

Privileged Account Management Multi-factor Authentication Vulnerability Scanning User Training User Account Management Threat Intelligence Program
Tecnologías afectadas (1)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.
Picketlink — Picketlink^AI
CWE

CWE-347
Referencias

JSON original (NVD)

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          "vendor": "Red Hat",
          "product": "Red Hat JBoss Enterprise Application Platform 7",
          "packageName": "picketlink-federation",
          "collectionURL": "https://access.redhat.com/jbossnetwork/restricted/listSoftware.html",
          "defaultStatus": "affected"
        },
        {
          "cpes": [
            "cpe:/a:redhat:jboss_enterprise_application_platform:8"
          ],
          "vendor": "Red Hat",
          "product": "Red Hat JBoss Enterprise Application Platform 8",
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        },
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  ],
  "published": "2026-08-11T09:17:12.687",
  "references": [
    {
      "url": "https://access.redhat.com/errata/RHSA-2026:53644",
      "source": "secalert@redhat.com"
    },
    {
      "url": "https://access.redhat.com/errata/RHSA-2026:53645",
      "source": "secalert@redhat.com"
    },
    {
      "url": "https://access.redhat.com/errata/RHSA-2026:53646",
      "source": "secalert@redhat.com"
    },
    {
      "url": "https://access.redhat.com/errata/RHSA-2026:53806",
      "source": "secalert@redhat.com"
    },
    {
      "url": "https://access.redhat.com/security/cve/CVE-2026-15556",
      "source": "secalert@redhat.com"
    },
    {
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2483121",
      "source": "secalert@redhat.com"
    }
  ],
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "secalert@redhat.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-347"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "A flaw was found in Picketlink's SP signature validation; a SAML response containing zero assertion elements matching the signature check can allow an attacker to forge a SAML response and auth as any principal with any roles on the protected application."
    }
  ],
  "lastModified": "2026-09-25T13:17:08.953",
  "sourceIdentifier": "secalert@redhat.com"
}