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

CVE-2026-48502

Gravedad CVSS v4.0:
ALTA
Tipo:
CWE-125 Lectura fuera de límites
Fecha de publicación:
22/06/2026
Última modificación:
23/06/2026

Descripción

*** Pendiente de traducción *** MessagePack for C# is a MessagePack serializer for C#. Prior to 2.5.301 and 3.1.7, MessagePackReader.ReadDateTime() can allocate stack memory based on an attacker-controlled MessagePack extension length. In the slow path for timestamp extension parsing, the computed tokenSize includes the extension body length from the wire and is used in a stackalloc operation before the extension length is validated as one of the valid timestamp sizes. A very small payload can claim a large timestamp extension body and cause a stack allocation large enough to trigger an uncatchable StackOverflowException, terminating the host process. This vulnerability is fixed in 2.5.301 and 3.1.7.

Productos y versiones vulnerables

CPE Desde Hasta
cpe:2.3:a:messagepack:messagepack:*:*:*:*:*:c\#:*:* 2.5.301 (excluyendo)
cpe:2.3:a:messagepack:messagepack:*:*:*:*:*:c\#:*:* 3.0.3 (incluyendo) 3.1.7 (excluyendo)