CVE-2026-50273

Datadog .NET Tracer: Improper parsing of W3C baggage headers may lead to DoS

Published Jul 17, 2026 CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Github GHSA Github GHSA GHSA-38wr-vpc7-2mp4 dd-trace-dotnet: Improper parsing of W3C baggage headers may lead to DoS
History
Type Values Removed Values Added
First Time appeared Datadog
Datadog dd-trace-dotnet
Vendors & Products Datadog
Datadog dd-trace-dotnet
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title Datadog .NET Tracer: Improper parsing of W3C baggage headers may lead to DoS
Weaknesses CWE-770
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
Jul 17, 2026, 7:46 PM
Reserved
Jun 4, 2026, 4:26 PM
Status
Awaiting Analysis
Published
Jul 17, 2026, 6:17 PM
Modified
Oct 24, 2026, 8:10 PM