Vulnerability · Published Jul 17, 2026 · Assigned by GitHub_M
CVE-2026-50273Datadog .NET Tracer: Improper parsing of W3C baggage headers may lead to DoS
High 7.5
In plain English
A high-severity resource allocation without limits in dd-trace-dotnet from DataDog. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.8% (higher than 57% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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 & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| NuGet | datadog.trace | 3.43.0 | GHSA-38wr-vpc7-2mp4 |
| NuGet | datadog.trace.opentracing | 3.43.0 | GHSA-38wr-vpc7-2mp4 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| DataDog | dd-trace-dotnet | < 3.43.0 |
Weakness: CWE-770 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
References
- https://github.com/DataDog/dd-trace-dotnet/security/advisories/GHSA-38wr-vpc7-2mp4 x_refsource_CONFIRM
- https://github.com/DataDog/dd-trace-dotnet/pull/8555 x_refsource_MISC
- https://github.com/DataDog/dd-trace-dotnet/commit/38092e0d41a36decbe649e048e48ae1b1607292f x_refsource_MISC
- https://github.com/DataDog/dd-trace-dotnet/releases/tag/v3.43.0 x_refsource_MISC