Datadog dd-trace-cpp up to 2.0.x Baggage Extraction allocation of resources

Summaryinfo

A vulnerability categorized as problematic has been discovered in Datadog dd-trace-cpp up to 2.0.x. Affected by this vulnerability is an unknown functionality of the component Baggage Extraction. Executing a manipulation can lead to allocation of resources. The identification of this vulnerability is CVE-2026-50277. The attack may be launched remotely. There is no exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic was found in Datadog dd-trace-cpp up to 2.0.x. This vulnerability affects an unknown functionality of the component Baggage Extraction. The manipulation with an unknown input leads to a allocation of resources vulnerability. The CWE definition for the vulnerability is CWE-770. The product allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor. As an impact it is known to affect availability. CVE summarizes:

dd-trace-cpp is the Datadog distributed tracing library for C++. Prior to 2.1.0, dd-trace-cpp parses incoming W3C baggage headers without enforcing DD_TRACE_BAGGAGE_MAX_ITEMS or DD_TRACE_BAGGAGE_MAX_BYTES on the extraction path, even though those limits are enforced during injection. A remote unauthenticated attacker can send a header containing many comma-separated key-value pairs or one very large value, causing per-request hash-map allocation and unbounded CPU and memory consumption. Baggage extraction is enabled by default in most affected tracers unless baggage is removed from DD_TRACE_PROPAGATION_STYLE or DD_TRACE_PROPAGATION_STYLE_EXTRACT, so affected internet-facing services can be denied service. This issue is fixed in version 2.1.0.

The advisory is shared for download at github.com. This vulnerability was named CVE-2026-50277 since 06/04/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1499.

Upgrading to version 2.1.0 eliminates this vulnerability.

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Productinfo

Type

• Network Management Software

Vendor

• Datadog

Name

• dd-trace-cpp

Version

• 2.0

Website

• Product: https://github.com/DataDog/dd-trace-cpp/

CPE 2.3info

• 🔒

CPE 2.2info

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