CVE-2026-49136

Estado: AplazadaAlta (8.7)—

Banana Slides through 0.4.0, patched in commit e8bc490, contains a path traversal vulnerability in the generate_image() function within the AI service backend that allows unauthenticated attackers to read arbitrary image-format files outside the intended uploads directory by exploiting an incomplete path prefix check using os.path.startswith() without a trailing separator. Attackers can supply crafted markdown image references in user-controlled page descriptions that resolve to sibling directories whose names share the uploads folder prefix, bypassing the directory confinement check and causing the application to read files from unintended locations via PIL Image.open().

CVSS

Versión: 4.0
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/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
Puntuación base: 8.7

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 0.60%
Percentil entre todas las CVEs puntuadas: 47
Fecha de la puntuación: 4/10/2026

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 access95 %
Impacto principalT1005 Data from Local Systemcollection90 %

Vulnerabilidad de path traversal (CWE-22) en servicio web sin autenticación (AV:N/PR:N/UI:N) accesible remotamente. Permite lectura de archivos arbitrarios mediante referencias malformadas en descripciones controladas por el usuario.

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 Scanning Privileged Account Management Network Segmentation Limit Access to Resource Over Network Filter Network Traffic Application Isolation and Sandboxing

Tecnologías afectadas (1)

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

Banana Slides — Banana Slides^AI

CWE

CWE-22

Referencias

JSON original (NVD)

Mostrar

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      "source": "disclosure@vulncheck.com"
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      "url": "https://github.com/Anionex/banana-slides/pull/430",
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      "lang": "en",
      "value": "Banana Slides through 0.4.0, patched in commit e8bc490, contains a path traversal vulnerability in the generate_image() function within the AI service backend that allows unauthenticated attackers to read arbitrary image-format files outside the intended uploads directory by exploiting an incomplete path prefix check using os.path.startswith() without a trailing separator. Attackers can supply crafted markdown image references in user-controlled page descriptions that resolve to sibling directories whose names share the uploads folder prefix, bypassing the directory confinement check and causing the application to read files from unintended locations via PIL Image.open()."
    },
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      "lang": "es",
      "value": "Banana Slides a través de 0.4.0, parcheado en el commit e8bc490, contiene una vulnerabilidad de salto de ruta en la función generate_image() dentro del backend del servicio de IA que permite a atacantes no autenticados leer archivos arbitrarios en formato de imagen fuera del directorio uploads previsto, explotando una verificación incompleta del prefijo de ruta que utiliza os.path.startswith() sin un separador final. Los atacantes pueden proporcionar referencias de imagen de markdown manipuladas en descripciones de página controladas por el usuario que se resuelven en directorios hermanos cuyos nombres comparten el prefijo de la carpeta uploads, eludiendo la verificación de confinamiento del directorio y haciendo que la aplicación lea archivos de ubicaciones no deseadas a través de PIL Image.open()."
    }
  ],
  "lastModified": "2026-07-22T08:10:00.117",
  "sourceIdentifier": "disclosure@vulncheck.com"
}