CVE-2026-5795

Estado: ModificadaAlta (7.4)—
In Eclipse Jetty, the class JASPIAuthenticator initiates the authentication checks, which set two ThreadLocal variable.
Upon returning from the initial checks, there are conditions that cause an early return from the JASPIAuthenticator code without clearing those ThreadLocals.
A subsequent request using the same thread inherits the ThreadLocal values, leading to a broken access control and privilege escalation.
CVSS

Versión: 3.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Puntuación base: 7.4
Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 0.61%
Percentil entre todas las CVEs puntuadas: 48
Fecha de la puntuación: 3/10/2026
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.
ExplotaciónT1190 Exploit Public-Facing Applicationinitial access85 %
Impacto principalT1078 Valid Accountsstealth · persistence · privilege escalation · initial access90 %
Impacto secundarioT1068 Exploitation for Privilege Escalationprivilege escalation80 %
Autenticación remota rota por ThreadLocal no limpiados (CWE-287), accesible sin privilegios por red. Permite heredar credenciales y permisos previos en la misma sesión de conexión.
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 Application Isolation and Sandboxing Exploit Protection Update Software Application Developer Guidance Active Directory Configuration
Tecnologías afectadas (1)

Eclipse — Jetty
CWE

CWE-226, CWE-287
CWE-226
Referencias

JSON original (NVD)

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  "published": "2026-04-08T14:16:32.633",
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      "type": "Secondary",
      "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
      "description": [
        {
          "lang": "en",
          "value": "CWE-226"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "In Eclipse Jetty, the class JASPIAuthenticator initiates the authentication checks, which set two ThreadLocal variable.\n\n\nUpon returning from the initial checks, there are conditions that cause an early return from the JASPIAuthenticator code without clearing those ThreadLocals.\n\n\nA subsequent request using the same thread inherits the ThreadLocal values, leading to a broken access control and privilege escalation."
    },
    {
      "lang": "es",
      "value": "En Eclipse Jetty, la clase JASPIAuthenticator inicia las comprobaciones de autenticación, que establecen dos variables ThreadLocal.\n\nAl regresar de las comprobaciones iniciales, existen condiciones que provocan un retorno anticipado del código de JASPIAuthenticator sin borrar esas ThreadLocals.\n\nUna solicitud posterior utilizando el mismo hilo hereda los valores de ThreadLocal, lo que lleva a un control de acceso roto y escalada de privilegios."
    }
  ],
  "lastModified": "2026-09-14T13:18:42.263",
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