Vulnerabilidad · Publicado 11/09/2026
El middleware compression para Node.js y Express en versiones anteriores a 1.8.2 presenta una vulnerabilidad que causa fuga de memoria nativa de zlib cuando clientes abortan conexiones durante respuestas comprimidas. Un atacante remoto puede agotar recursos del servidor mediante desconexiones repetidas y prematuras, impactando la disponibilidad de aplicaciones web y API REST en entornos de producción de LATAM.
compression is a Node.js and Express compression middleware. In versions before 1.8.2, when a client aborts the connection while a compressed response is still being sent, the zlib stream created to compress that response is never destroyed, so each aborted compressed response leaks its native zlib memory. A remote unauthenticated attacker can repeatedly open requests and disconnect early, exhausting the available memory and crashing the server. All applications using compression are affected. The issue is fixed in compression 1.8.2, and users should upgrade to 1.8.2 or later.
Score: 7.5/10 — Severidad: HIGH — Estado NIST: Received
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE-401, CWE-459
Publicado en NIST NVD.