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CVE-2026-32255

Estado: AnalizadaAlta (8.6)—

Kan is an open-source project management tool. In versions 0.5.4 and below, the /api/download/attatchment endpoint has no authentication and no URL validation. The Attachment Download endpoint accepts a user-supplied URL query parameter and passes it directly to fetch() server-side, and returns the full response body. An unauthenticated attacker can use this to make HTTP requests from the server to internal services, cloud metadata endpoints, or private network resources. This issue has been fixed in version 0.5.5. To workaround this issue, block or restrict access to /api/download/attatchment at the reverse proxy level (nginx, Cloudflare, etc.).

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/AC:L/PR:N indica explotación remota sin autenticación (T1190). El endpoint sin validación de URL permite SSRF (T1090) hacia servicios internos y metadata endpoints, con riesgo de lectura de datos sensibles (T1005).

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

Filter Network TrafficVulnerability ScanningSSL/TLS InspectionPrivileged Account ManagementNetwork SegmentationNetwork Intrusion Prevention

Tecnologías afectadas (1)

KAN — KAN

CWE

Referencias

JSON original (NVD)

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      "value": "Kan is an open-source project management tool. In versions 0.5.4 and below, the /api/download/attatchment endpoint has no authentication and no URL validation. The Attachment Download endpoint accepts a user-supplied URL query parameter and passes it directly to fetch() server-side, and returns the full response body. An unauthenticated attacker can use this to make HTTP requests from the server to internal services, cloud metadata endpoints, or private network resources. This issue has been fixed in version 0.5.5. To workaround this issue, block or restrict access to /api/download/attatchment at the reverse proxy level (nginx, Cloudflare, etc.)."
    },
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      "value": "Kan es una herramienta de gestión de proyectos de código abierto. En las versiones 0.5.4 e inferiores, el endpoint /api/download/attatchment no tiene autenticación ni validación de URL. El endpoint de descarga de adjuntos acepta un parámetro de consulta de URL proporcionado por el usuario y lo pasa directamente a fetch() en el lado del servidor, y devuelve el cuerpo completo de la respuesta. Un atacante no autenticado puede usar esto para realizar solicitudes HTTP desde el servidor a servicios internos, endpoints de metadatos en la nube o recursos de red privados. Este problema ha sido solucionado en la versión 0.5.5. Para solucionar este problema, bloquee o restrinja el acceso a /api/download/attatchment a nivel de proxy inverso (nginx, Cloudflare, etc.)."
    }
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  "lastModified": "2026-06-17T10:35:26.237",
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