CVE-2026-49754

Estado: AplazadaAlta (8.2)—

Allocation of Resources Without Limits or Throttling vulnerability in elixir-mint Mint allows attacker-controlled HTTP/2 servers to exhaust memory in a Mint client (HTTP/2 CONTINUATION flood).

When Mint's HTTP/2 receive path observes a HEADERS frame without the END_HEADERS flag, the unparsed header-block fragment is parked in conn.headers_being_processed, and every subsequent CONTINUATION frame on that stream is appended to the accumulator. Nothing in the receive path caps the accumulator: there is no per-stream size limit, no CONTINUATION frame-count limit, and max_header_list_size is only enforced on outgoing requests, never on inbound header blocks (its default is :infinity).

Leer descripción completaMostrar menos

A malicious or compromised HTTP/2 server can stream an endless sequence of CONTINUATION frames (each up to the peer-advertised SETTINGS_MAX_FRAME_SIZE) and drive the client's iolist to arbitrary size, causing memory exhaustion and BEAM process death. A single connection to an attacker-controlled HTTP/2 endpoint is sufficient.

This issue affects mint: from 0.1.0 before 1.9.0.

CVSS

Versión: 4.0
Vector: CVSS:4.0/AV:N/AC:L/AT:P/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: 8.2

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 0.52%
Percentil entre todas las CVEs puntuadas: 43
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 access85 %
Impacto principalT1499.004 Application or System Exploitationimpact90 %
Impacto secundarioT1068 Exploitation for Privilege Escalationprivilege escalation60 %

Servidor HTTP/2 malicioso explota falta de límites en acumulación de CONTINUATION frames (CWE-770) remotamente sin autenticación (PR:N, AV:N), causando agotamiento de memoria (VA:H) y crash del proceso BEAM (DoS de disponibilidad).

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 Application Isolation and Sandboxing Exploit Protection Update Software Vulnerability Scanning Threat Intelligence Program

Tecnologías afectadas (1)

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

Elixir-mint — Mint^AI

CWE

CWE-770

Referencias

JSON original (NVD)

Mostrar

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  "id": "CVE-2026-49754",
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          "vendor": "elixir-mint",
          "modules": [
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  "published": "2026-06-02T16:16:44.930",
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      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db"
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    {
      "lang": "en",
      "value": "Allocation of Resources Without Limits or Throttling vulnerability in elixir-mint Mint allows attacker-controlled HTTP/2 servers to exhaust memory in a Mint client (HTTP/2 CONTINUATION flood).\n\nWhen Mint's HTTP/2 receive path observes a HEADERS frame without the END_HEADERS flag, the unparsed header-block fragment is parked in conn.headers_being_processed, and every subsequent CONTINUATION frame on that stream is appended to the accumulator. Nothing in the receive path caps the accumulator: there is no per-stream size limit, no CONTINUATION frame-count limit, and max_header_list_size is only enforced on outgoing requests, never on inbound header blocks (its default is :infinity).\n\nA malicious or compromised HTTP/2 server can stream an endless sequence of CONTINUATION frames (each up to the peer-advertised SETTINGS_MAX_FRAME_SIZE) and drive the client's iolist to arbitrary size, causing memory exhaustion and BEAM process death. A single connection to an attacker-controlled HTTP/2 endpoint is sufficient.\n\nThis issue affects mint: from 0.1.0 before 1.9.0."
    },
    {
      "lang": "es",
      "value": "La vulnerabilidad de asignación de recursos sin límites ni limitación en elixir-mint Mint permite a los servidores HTTP/2 controlados por el atacante agotar la memoria en un cliente Mint (inundación de CONTINUATION de HTTP/2).\n\nCuando la ruta de recepción HTTP/2 de Mint observa un frame HEADERS sin el flag END_HEADERS, el fragmento de bloque de encabezado no analizado se estaciona en conn.headers_being_processed, y cada frame CONTINUATION subsiguiente en ese flujo se añade al acumulador. Nada en la ruta de recepción limita el acumulador: no hay un límite de tamaño por flujo, ningún límite de conteo de frames CONTINUATION, y max_header_list_size solo se aplica a las solicitudes salientes, nunca a los bloques de encabezado entrantes (su valor predeterminado es :infinity).\n\nUn servidor HTTP/2 malicioso o comprometido puede transmitir una secuencia interminable de frames CONTINUATION (cada uno hasta el SETTINGS_MAX_FRAME_SIZE anunciado por el par) y llevar el iolist del cliente a un tamaño arbitrario, causando agotamiento de memoria y la muerte del proceso BEAM. Una sola conexión a un endpoint HTTP/2 controlado por el atacante es suficiente.\n\nEste problema afecta a mint: desde 0.1.0 antes de 1.9.0."
    }
  ],
  "lastModified": "2026-07-22T19:10:00.120",
  "sourceIdentifier": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db"
}