PT-2026-51400 · Messagepack Csharp · Messagepack-Csharp

Publicado 2026-06-22 · Atualizado 2026-06-22 · CVE-2026-48516

NVD

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/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

MessagePack for C# is a MessagePack serializer for C#. Prior to 2.5.301 and 3.1.7, InterfaceLookupFormatter<TKey,TElement> constructs an internal Dictionary<TKey, IGrouping<TKey,TElement>> with the default equality comparer instead of the security-aware comparer supplied by options.Security.GetEqualityComparer(). This formatter omission allows hash-collision CPU denial of service against ILookup<TKey,TElement> even when the application has opted into the untrusted-data security posture This vulnerability is fixed in 2.5.301 and 3.1.7.

Correção

Enumeração de Fraquezas

CWE-407

Identificadores relacionados

CVE-2026-48516

Produtos afetados

Messagepack-Csharp

Referências · 2

• https://nvd.nist.gov/vuln/detail/CVE-2026-48516 · Nota de Segurança
• https://github.com/MessagePack-CSharp/MessagePack-CSharp/security/advisories/GHSA-q2h6-ghwm-5qm8 · Nota