CVE-2026-77125

Estado: AnalizadaAlta (7.1)—

A vulnerability was identified in Sonatype Nexus Repository 3 in which two blobstore group management REST API endpoints did not correctly enforce the intended authorization check. A user granted only the nexus:blobstores:create permission could invoke these endpoints to convert an existing blobstore into a group blobstore, an action that should require the nexus:blobstores:update permission instead. This could result in unauthorized modification of blobstore configuration without administrator approval. The nexus:blobstores:create permission is a named permission that must be explicitly granted by an administrator; it is not held by default.

CVSS

Versión: 4.0
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Puntuación base: 7.1

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 0.29%
Percentil entre todas las CVEs puntuadas: 20
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 movement75 %
Impacto principalT1078 Valid Accountsstealth · persistence · privilege escalation · initial access80 %
Impacto secundarioT1565.001 Stored Data Manipulationimpact70 %

AV:N/PR:L sin UI indica acceso remoto autenticado. CWE-863 (autorización incorrecta) permite a usuarios con permisos limitados modificar configuración de blobstore sin escalada explícita. El impacto es abuso de identidad/permisos y manipulación de datos de configuración.

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 Developer Guidance Active Directory Configuration Vulnerability Scanning User Training User Account Management

Tecnologías afectadas (1)

Sonatype — Nexus Repository Manager

CWE

CWE-863

Referencias

JSON original (NVD)

Mostrar

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          "vendor": "Sonatype",
          "product": "Nexus Repository 3",
          "versions": [
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              "status": "affected",
              "version": "3.19.0",
              "lessThan": "3.96.0",
              "versionType": "semver"
            }
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  ],
  "published": "2026-09-02T18:21:25.023",
  "references": [
    {
      "url": "https://help.sonatype.com/en/sonatype-nexus-repository-3-96-0-release-notes.html",
      "tags": [
        "Release Notes"
      ],
      "source": "103e4ec9-0a87-450b-af77-479448ddef11"
    },
    {
      "url": "https://support.sonatype.com/hc/en-us/articles/54643114434451/",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "103e4ec9-0a87-450b-af77-479448ddef11"
    }
  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
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      "type": "Secondary",
      "source": "103e4ec9-0a87-450b-af77-479448ddef11",
      "description": [
        {
          "lang": "en",
          "value": "CWE-863"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "A vulnerability was identified in Sonatype Nexus Repository 3 in which two blobstore group management REST API endpoints did not correctly enforce the intended authorization check. A user granted only the nexus:blobstores:create permission could invoke these endpoints to convert an existing blobstore into a group blobstore, an action that should require the nexus:blobstores:update permission instead. This could result in unauthorized modification of blobstore configuration without administrator approval. The nexus:blobstores:create permission is a named permission that must be explicitly granted by an administrator; it is not held by default."
    }
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  "lastModified": "2026-09-22T17:17:56.897",
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