{"id":"CVE-2026-50277","title":"dd-trace-cpp is the Datadog distributed tracing library for C++","summary":"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 tho…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-770"],"vendor":"DataDog","product":"dd-trace-cpp","affected":["dd-trace-cpp < 2.1.0"],"published":"2026-09-17","updated":"2026-09-21","sourceUpdated":"2026-09-21T21:17:04.053","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-50277","references":[{"url":"https://github.com/DataDog/dd-trace-cpp/commit/422dc91bb93e358e3977381275d311f3f926d666","label":"security-advisories@github.com"},{"url":"https://github.com/DataDog/dd-trace-cpp/pull/313","label":"security-advisories@github.com"},{"url":"https://github.com/DataDog/dd-trace-cpp/releases/tag/v2.1.0","label":"security-advisories@github.com"},{"url":"https://github.com/DataDog/dd-trace-cpp/security/advisories/GHSA-ch7h-phmx-rqwq","label":"security-advisories@github.com"}],"tags":["nvd","cve.org"],"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"partial","timestamp":"2026-09-21T21:12:22.481903Z"},"epss":0.00562,"epssPercentile":0.45264,"ingestedAt":"2026-09-17T20:28:02.782Z","slug":"CVE-2026-50277","body":"## Overview\n\ndd-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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}