csirt@kutim:~/threat-intel/cve/CVE-2026-48509

Katalog CVE

CVSS 9.1 · Critical EPSS 0,42%

Kerentanan Initialization of a Resource with an Insecure Default pada messagepack. Skor CVSS 3.1 9.1 (Critical) menurut NVD.

Deskripsi (NVD)

MessagePack for C# is a MessagePack serializer for C#. Prior to 2.5.301 and 3.1.7, the parameterless MessagePackInputFormatter() constructor uses default serializer options, which resolve to MessagePackSerializerOptions.Standard with MessagePackSecurity.TrustedData. The formatter is designed for ASP.NET Core MVC request bodies, which commonly cross an HTTP trust boundary. This insecure default can expose applications to denial-of-service attacks that MessagePackSecurity.UntrustedData is intended to mitigate, such as hash-collision attacks against dictionary-like model properties. This vulnerability is fixed in 2.5.301 and 3.1.7.

Rincian

Terbit di NVD
22 Juni 2026
Terakhir diubah
25 Juni 2026
Status NVD
Analyzed
CVSS 3.1
9.1 (Critical), sumber NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H · uraikan di kalkulator
Jenis kelemahan (CWE)
CWE-1188: Initialization of a Resource with an Insecure Default
EPSS (30 hari)
0,42% peluang dieksploitasi; lebih tinggi dari 34,1% CVE lain

Produk dan versi terdampak

VendorProdukVersi terdampak
messagepack messagepack Semua versi sebelum 2.5.301
messagepack messagepack Versi 3.0.3 hingga sebelum 3.1.7

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

Sumber: NVD · CVE.org · EPSS. Halaman ini disusun otomatis dari data tersebut; pembaruan terakhir 5 Okt 2026, 20:11 WITA. Kalau sistem di Perangkat Daerah memakai produk ini dan butuh bantuan, laporkan lewat kanal pelaporan.