CVE-2026-31812

Estado: AplazadaAlta (8.7)—
Quinn is a pure-Rust, async-compatible implementation of the IETF QUIC transport protocol. Prior to 0.11.14, a remote, unauthenticated attacker can trigger a denial of service in applications using vulnerable quinn versions by sending a crafted QUIC Initial packet containing malformed quic_transport_parameters. In quinn-proto parsing logic, attacker-controlled varints are decoded with unwrap(), so truncated encodings cause Err(UnexpectedEnd) and panic. This is reachable over the network with a single packet and no prior trust or authentication. This vulnerability is fixed in 0.11.14.
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: 0.89%
Percentil entre todas las CVEs puntuadas: 58
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 access95 %
Impacto principalT1499.004 Application or System Exploitationimpact90 %
Vulnerabilidad de red remota sin autenticación (AV:N/PR:N/UI:N) en QUIC con panic por varints malformados. DoS por caída de servicio con un paquete crafted.
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)

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

CWE-248
CWE-248
Referencias

JSON original (NVD)

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    {
      "lang": "en",
      "value": "Quinn is a pure-Rust, async-compatible implementation of the IETF QUIC transport protocol. Prior to 0.11.14, a remote, unauthenticated attacker can trigger a denial of service in applications using vulnerable quinn versions by sending a crafted QUIC Initial packet containing malformed quic_transport_parameters. In quinn-proto parsing logic, attacker-controlled varints are decoded with unwrap(), so truncated encodings cause Err(UnexpectedEnd) and panic. This is reachable over the network with a single packet and no prior trust or authentication. This vulnerability is fixed in 0.11.14."
    },
    {
      "lang": "es",
      "value": "Quinn es una implementación pure-Rust, compatible con async, del protocolo de transporte QUIC del IETF. Antes de la 0.11.14, un atacante remoto no autenticado puede desencadenar una denegación de servicio en aplicaciones que utilizan versiones vulnerables de quinn al enviar un paquete QUIC Initial manipulado que contiene parámetros de transporte QUIC malformados. En la lógica de análisis de quinn-proto, los varints controlados por el atacante se decodifican con unwrap(), por lo que las codificaciones truncadas causan Err(UnexpectedEnd) y pánico. Esto es alcanzable a través de la red con un solo paquete y sin confianza o autenticación previa. Esta vulnerabilidad está corregida en la versión 0.11.14."
    }
  ],
  "lastModified": "2026-08-25T13:18:17.813",
  "sourceIdentifier": "security-advisories@github.com"
}