CVE Catalog

CVE-2026-50277

HighCVSS 7.5
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Elevated risk
0.79%

54th percentile - higher than 54% of all known CVEs

Summary

In dd-trace-cpp prior to 2.1.0, parsing incoming W3C baggage headers does not enforce DD_TRACE_BAGGAGE_MAX_ITEMS or DD_TRACE_BAGGAGE_MAX_BYTES. A remote unauthenticated attacker can send a header with many key-value pairs or one very large value, causing unbounded CPU and memory consumption.

Risk Assessment

Internet-facing services can be denied service due to unbounded resource consumption on each request.

Recommendation

Upgrade dd-trace-cpp to version 2.1.0 or later; until then consider removing baggage from DD_TRACE_PROPAGATION_STYLE or DD_TRACE_PROPAGATION_STYLE_EXTRACT.

Related vulnerabilities

Original NVD description (English source)

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.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS