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CVE-2026-44973

Estado: AplazadaAlta (8.1)—

Billy is an interface filesystem abstraction for Go. Prior to 5.9.0, multiple path traversal issues exist across different components of go-billy. Insufficient path sanitization and boundary enforcement may allow crafted paths (e.g., using ..) to escape intended base directories. While go-billy was not originally designed to provide a strong security boundary, some of these issues were inconsistent across some of the built-in implementations. This results in scenarios where applications relying on go-billy for some level of isolation may inadvertently expose access to unintended filesystem locations. This vulnerability is fixed in 5.9.0.

CVSS

Probabilidad de explotación (EPSS)

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.

AV:N/PR:L indica acceso remoto con privilegios; path traversal (CWE-22) permite lectura y potencial modificación de archivos fuera del directorio base de go-billy.

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

Network SegmentationVulnerability ScanningThreat Intelligence ProgramRestrict File and Directory PermissionsPrivileged Account ManagementRemote Data Storage

Tecnologías afectadas (1)

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

Go-billy — Go-billyAI

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2026-44973",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-44973",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-06-01T18:40:39.211860Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "security-advisories@github.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": "security-advisories@github.com",
      "affectedData": [
        {
          "vendor": "go-git",
          "product": "go-billy",
          "versions": [
            {
              "status": "affected",
              "version": "< 5.9.0"
            }
          ]
        }
      ]
    }
  ],
  "published": "2026-05-28T22:16:59.937",
  "references": [
    {
      "url": "https://github.com/go-git/go-billy/security/advisories/GHSA-qw64-3x98-g7q2",
      "source": "security-advisories@github.com"
    }
  ],
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "security-advisories@github.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-22"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Billy is an interface filesystem abstraction for Go. Prior to 5.9.0, multiple path traversal issues exist across different components of go-billy. Insufficient path sanitization and boundary enforcement may allow crafted paths (e.g., using ..) to escape intended base directories. While go-billy was not originally designed to provide a strong security boundary, some of these issues were inconsistent across some of the built-in implementations. This results in scenarios where applications relying on go-billy for some level of isolation may inadvertently expose access to unintended filesystem locations. This vulnerability is fixed in 5.9.0."
    },
    {
      "lang": "es",
      "value": "Billy es una abstracción de interfaz de sistema de archivos para Go. Antes de 5.9.0, existen múltiples problemas de salto de ruta en diferentes componentes de go-billy. Una sanitización de rutas y una aplicación de límites insuficientes pueden permitir que rutas manipuladas (por ejemplo, usando ..) escapen de los directorios base previstos. Aunque go-billy no fue diseñado originalmente para proporcionar un límite de seguridad robusto, algunos de estos problemas eran inconsistentes en algunas de las implementaciones integradas. Esto da lugar a escenarios en los que las aplicaciones que dependen de go-billy para cierto nivel de aislamiento pueden exponer inadvertidamente el acceso a ubicaciones del sistema de archivos no deseadas. Esta vulnerabilidad está corregida en 5.9.0."
    }
  ],
  "lastModified": "2026-07-21T10:10:00.103",
  "sourceIdentifier": "security-advisories@github.com"
}