Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

CVE-2026-33592

Gravedad CVSS v3.1:
ALTA
Tipo:
No Disponible / Otro tipo
Fecha de publicación:
02/07/2026
Última modificación:
02/07/2026

Descripción

*** Pendiente de traducción *** An unauthenticated remote attacker can exhaust<br /> server memory via the FindServers Discovery Service in open62541. The<br /> serverUris field of FindServersRequest is not validated for length or array<br /> size. An attacker can declare an arbitrarily large string (up to ~3.9 GB)<br /> delivered across intermediate chunks without ever sending the final chunk. The<br /> server buffers all chunks in RAM indefinitely until the SecureChannel times<br /> out. The attack is pre-session and bypasses all encryption configuration. The issue affects open62541: from 1.4.0 through 1.4.16, from 1.5.0 through 1.5.4, master.