High 7.5Published Sep 17, 2026

CVE-2026-50277dd-trace-cpp: Improper parsing of W3C baggage headers may lead to DoS

Updated under an hour ago (2026-10-19 10:23 UTC)

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No exploitation reported and no EPSS estimate yet.

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Every CVE for DataDog dd-trace-cpp

Exploited in the last 30 days

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: 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-770
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Awaiting Analysis
Record last updated: Sep 21, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

DataDog dd-trace-cpp datadog:dd_trace_cpp (from the name)	before 2.1.0	CNA record

References

https://github.com/DataDog/dd-trace-cpp/security/advisories/GHSA-ch7h-phmx-rqwqx-refsource-confirm
https://github.com/DataDog/dd-trace-cpp/pull/313x-refsource-misc
https://github.com/DataDog/dd-trace-cpp/commit/422dc91bb93e358e3977381275d311f3f926d666x-refsource-misc
https://github.com/DataDog/dd-trace-cpp/releases/tag/v2.1.0x-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.