CVE-2026-50277
highdd-trace-cpp is the Datadog distributed tracing library for C++.
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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://github.com/DataDog/dd-trace-cpp/commit/422dc91bb93e358e3977381275d311f3f926d666 security-advisories@github.com
- https://github.com/DataDog/dd-trace-cpp/pull/313 security-advisories@github.com
- https://github.com/DataDog/dd-trace-cpp/releases/tag/v2.1.0 security-advisories@github.com
- https://github.com/DataDog/dd-trace-cpp/security/advisories/GHSA-ch7h-phmx-rqwq security-advisories@github.com