What’s Vulnerable › Vulnerabilities

CVE-2026-50273: Datadog .NET Tracer: Improper parsing of W3C baggage headers may lead to DoS

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-17 · updated 2026-10-24
• Weakness: CWE-770

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 products

• DataDog dd-trace-dotnet: before 3.43.0

References

• https://github.com/DataDog/dd-trace-dotnet/commit/38092e0d41a36decbe649e048e48ae1b1607292f
• https://github.com/DataDog/dd-trace-dotnet/pull/8555
• https://github.com/DataDog/dd-trace-dotnet/releases/tag/v3.43.0
• https://github.com/DataDog/dd-trace-dotnet/security/advisories/GHSA-38wr-vpc7-2mp4

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