High severityOSV Advisory· Published Jul 17, 2026· Updated Jul 17, 2026
Datadog .NET Tracer: Improper parsing of W3C baggage headers may lead to DoS
CVE-2026-50273
Description
Datadog .NET Tracer is a client library for Datadog APM for .NET applications. Prior to 3.43.0, Datadog tracing libraries that implement W3C baggage propagation parse incoming baggage HTTP headers without enforcing DD_TRACE_BAGGAGE_MAX_ITEMS or DD_TRACE_BAGGAGE_MAX_BYTES on extraction, allowing a remote unauthenticated attacker to send a baggage header with many comma-separated key-value pairs or one very large value and cause unbounded CPU and memory consumption in services with baggage propagation enabled. This issue is fixed in version 3.43.0.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
Datadog.TraceNuGet | < 3.43.0 | 3.43.0 |
Datadog.Trace.OpenTracingNuGet | < 3.43.0 | 3.43.0 |
Affected products
2- Range: v3.42.0, v3.41.0, v3.40.0, …
- Range: <3.43.0
Patches
Vulnerability mechanics
References
5- github.com/advisories/GHSA-38wr-vpc7-2mp4ghsaADVISORY
- github.com/DataDog/dd-trace-dotnet/commit/38092e0d41a36decbe649e048e48ae1b1607292fmitrex_refsource_MISC
- github.com/DataDog/dd-trace-dotnet/pull/8555mitrex_refsource_MISC
- github.com/DataDog/dd-trace-dotnet/releases/tag/v3.43.0mitrex_refsource_MISC
- github.com/DataDog/dd-trace-dotnet/security/advisories/GHSA-38wr-vpc7-2mp4ghsax_refsource_CONFIRMWEB
News mentions
0No linked articles in our index yet.