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Tracking
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| Source | ID | Title |
|---|---|---|
Github GHSA |
GHSA-2f33-pr97-265q | MessagePack-CSharp: ASP.NET Core MessagePackInputFormatter defaults to TrustedData for HTTP request bodies |
Wed, 24 Jun 2026 16:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Messagepack
Messagepack messagepack-csharp |
|
| Vendors & Products |
Messagepack
Messagepack messagepack-csharp |
Tue, 23 Jun 2026 13:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
|
Mon, 22 Jun 2026 22:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | 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. | |
| Title | MessagePack-CSharp: ASP.NET Core MessagePackInputFormatter defaults to TrustedData for HTTP request bodies | |
| Weaknesses | CWE-1188 | |
| References |
| |
| Metrics |
cvssV4_0
|
Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2026-06-25T15:02:55.701Z
Reserved: 2026-05-21T16:18:10.618Z
Link: CVE-2026-48509
Updated: 2026-06-23T12:51:05.977Z
No data.
No data.
OpenCVE Enrichment
Updated: 2026-06-24T16:07:16Z
Github GHSA