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CVE-2026-28492

Estado: AnalizadaAlta (7.1)—

File Browser provides a file managing interface within a specified directory and it can be used to upload, delete, preview, rename and edit files. Prior to version 2.61.0, when a user creates a public share link for a directory, the withHashFile middleware in http/public.go uses filepath.Dir(link.Path) to compute the BasePathFs root. This sets the filesystem root to the parent directory instead of the shared directory itself, allowing anyone with the share link to browse and download files from all sibling directories. This issue has been patched in version 2.61.0.

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.

Acceso de red con autenticación (PR:L) a servicio remoto para leer datos de hermanos. Vector CVSS:N/PR:L indica T1210. La vulnerabilidad permite navegar y descargar archivos más allá del directorio compartido (T1005), revelando información no autorizada (CWE-200, VC:H).

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

Vulnerability ScanningUser TrainingUser Account ManagementThreat Intelligence ProgramPrivileged Account ManagementNetwork Segmentation

Tecnologías afectadas (1)

Filebrowser — Filebrowser

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2026-28492",
  "cveTags": [],
  "metrics": {
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        "ssvcData": {
          "id": "CVE-2026-28492",
          "role": "CISA Coordinator",
          "options": [
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            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
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          "version": "2.0.3",
          "timestamp": "2026-03-06T10:45:01.806014Z"
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          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 3.6,
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    "cvssMetricV40": [
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        "cvssData": {
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          "Recovery": "NOT_DEFINED",
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          "Automatable": "NOT_DEFINED",
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/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",
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          "subIntegrityImpact": "NONE",
          "vulnIntegrityImpact": "NONE",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
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          "vulnAvailabilityImpact": "NONE",
          "availabilityRequirement": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "subConfidentialityImpact": "NONE",
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          "confidentialityRequirement": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
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          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "vulnerabilityResponseEffort": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED"
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  "published": "2026-03-05T21:16:22.630",
  "references": [
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      "url": "https://github.com/filebrowser/filebrowser/commit/31194fb57a5b92e7155219d7ec7273028fcb2e83",
      "tags": [
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    {
      "url": "https://github.com/filebrowser/filebrowser/releases/tag/v2.61.0",
      "tags": [
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    },
    {
      "url": "https://github.com/filebrowser/filebrowser/security/advisories/GHSA-mr74-928f-rw69",
      "tags": [
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        "Vendor Advisory"
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  "vulnStatus": "Analyzed",
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      "description": [
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          "lang": "en",
          "value": "CWE-200"
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    }
  ],
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      "lang": "en",
      "value": "File Browser provides a file managing interface within a specified directory and it can be used to upload, delete, preview, rename and edit files. Prior to version 2.61.0, when a user creates a public share link for a directory, the withHashFile middleware in http/public.go uses filepath.Dir(link.Path) to compute the BasePathFs root. This sets the filesystem root to the parent directory instead of the shared directory itself, allowing anyone with the share link to browse and download files from all sibling directories. This issue has been patched in version 2.61.0."
    },
    {
      "lang": "es",
      "value": "Navegador de Archivos proporciona una interfaz de gestión de archivos dentro de un directorio especificado y se puede usar para subir, eliminar, previsualizar, renombrar y editar archivos. Antes de la versión 2.61.0, cuando un usuario crea un enlace de compartición público para un directorio, el middleware withHashFile en http/public.go usa filepath.Dir(link.Path) para calcular la raíz BasePathFs. Esto establece la raíz del sistema de archivos en el directorio padre en lugar del propio directorio compartido, permitiendo a cualquiera con el enlace de compartición navegar y descargar archivos de todos los directorios hermanos. Este problema ha sido parcheado en la versión 2.61.0."
    }
  ],
  "lastModified": "2026-06-17T10:28:44.327",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
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              "versionEndExcluding": "2.61.0",
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            }
          ],
          "operator": "OR"
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  ],
  "sourceIdentifier": "security-advisories@github.com"
}