CVE-2026-47067

Estado: AnalizadaAlta (8.7)—

Allocation of Resources Without Limits or Throttling vulnerability in benoitc hackney allows Flooding. The URL parser in src/hackney_url.erl converts every unrecognized URL scheme to a permanent BEAM atom via binary_to_atom/2. BEAM atoms are never garbage-collected and the atom table defaults to a hard limit of 1,048,576 entries. An attacker who can supply URLs with attacker-chosen scheme prefixes — directly as request targets, as configured webhook URLs, or via Location headers followed during redirects — can exhaust the atom table and crash the entire BEAM VM with system_limit.

This issue affects hackney: from 2.0.0 before 4.0.1.

CVSS

Versión: 4.0
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/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: 0.70%
Percentil entre todas las CVEs puntuadas: 52
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.

ExplotaciónT1190 Exploit Public-Facing Applicationinitial access90 %
Impacto principalT1499.004 Application or System Exploitationimpact85 %
Impacto secundarioT1499 Endpoint Denial of Serviceimpact75 %

Aplicación web expuesta (hackney HTTP client) vulnerable a DoS por exhaustión de recursos: análisis de URLs malformadas sin límite agota tabla BEAM atoms causando crash. AV:N, PR:N, UI:N confirma T1190.

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

Tecnologías afectadas (1)

Benoitc — Hackney

CWE

CWE-770

Referencias

JSON original (NVD)

Mostrar

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      "value": "Allocation of Resources Without Limits or Throttling vulnerability in benoitc hackney allows Flooding. The URL parser in src/hackney_url.erl converts every unrecognized URL scheme to a permanent BEAM atom via binary_to_atom/2. BEAM atoms are never garbage-collected and the atom table defaults to a hard limit of 1,048,576 entries. An attacker who can supply URLs with attacker-chosen scheme prefixes — directly as request targets, as configured webhook URLs, or via Location headers followed during redirects — can exhaust the atom table and crash the entire BEAM VM with system_limit.\n\nThis issue affects hackney: from 2.0.0 before 4.0.1."
    },
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      "lang": "es",
      "value": "Vulnerabilidad de asignación de recursos sin límites ni limitación de velocidad en benoitc hackney permite inundación. El analizador de URL en src/hackney_url.erl convierte cada esquema de URL no reconocido en un átomo BEAM permanente a través de binary_to_atom/2. Los átomos BEAM nunca se recolectan y la tabla de átomos tiene por defecto un límite estricto de 1.048.576 entradas. Un atacante que puede suministrar URL con prefijos de esquema elegidos por el atacante - directamente como objetivos de solicitud, como URL de webhook configuradas, o a través de encabezados Location seguidos durante las redirecciones - puede agotar la tabla de átomos y colapsar toda la VM BEAM con system_limit.\n\nEste problema afecta a hackney: desde 2.0.0 antes de 4.0.1."
    }
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