Vulnerability Description
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.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://github.com/DataDog/dd-trace-cpp/commit/422dc91bb93e358e3977381275d311f3f
- https://github.com/DataDog/dd-trace-cpp/pull/313
- https://github.com/DataDog/dd-trace-cpp/releases/tag/v2.1.0
- https://github.com/DataDog/dd-trace-cpp/security/advisories/GHSA-ch7h-phmx-rqwq
FAQ
What is CVE-2026-50277?
CVE-2026-50277 is a vulnerability with a CVSS score of 7.5 (HIGH). 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_B...
How severe is CVE-2026-50277?
CVE-2026-50277 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-50277?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.