PT-2026-51394 · Messagepack Csharp · Messagepack-Csharp

Publicado 2026-06-22 · Atualizado 2026-06-22 · CVE-2026-48510

Mitre

CVSS v4.0

6.3

Média

Vetor base

AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

MessagePack for C# is a MessagePack serializer for C#. Prior to 2.5.301 and 3.1.7, when MessagePack-CSharp decompresses Lz4Block or Lz4BlockArray payloads, it reads declared uncompressed lengths from the wire and allocates output buffers based on those lengths before validating that the compressed data is valid or that the declared expansion is reasonable. A small payload can claim a very large uncompressed length and force a large allocation before LZ4 decoding begins. This vulnerability is fixed in 2.5.301 and 3.1.7.

Correção

Allocation of Resources Without Limits

Enumeração de Fraquezas

CWE-770

CWE-409

Identificadores relacionados

CVE-2026-48510

Produtos afetados

Messagepack-Csharp

Referências · 2

• https://nvd.nist.gov/vuln/detail/CVE-2026-48510 · Nota de Segurança
• https://github.com/MessagePack-CSharp/MessagePack-CSharp/security/advisories/GHSA-v72x-2h86-7f8m · Nota