{"cve":"CVE-2026-50271","nvd":{"published":"2026-07-17T21:17:07.070","modified":"2026-10-24T20:10:00.137","status":"Awaiting Analysis","description":"Datadog dd-trace-py is the Datadog Python APM client. Prior to 4.8.2, Datadog tracing libraries that implement W3C baggage propagation parse incoming baggage HTTP headers without enforcing DD_TRACE_BAGGAGE_MAX_ITEMS or DD_TRACE_BAGGAGE_MAX_BYTES limits on the extract path. A remote, unauthenticated attacker can send a request whose baggage header contains an arbitrarily large number of comma-separated key-value pairs or a single very large value, causing unbounded CPU and memory consumption and enabling a remote denial of service against HTTP services with baggage propagation enabled. This issue is fixed in version 4.8.2.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5},"cwes":["CWE-770"],"references":["https://github.com/DataDog/dd-trace-py/commit/9c80faa3dcfe238d008c3b3cd0b8e5dfef0aa4cd","https://github.com/DataDog/dd-trace-py/pull/17926","https://github.com/DataDog/dd-trace-py/releases/tag/v4.8.2","https://github.com/DataDog/dd-trace-py/security/advisories/GHSA-mw54-j2v2-42hr"],"products":[],"source":"nvd","synced_at":"2026-10-25T17:50:08.599881581+00:00"},"epss":{"cve":"CVE-2026-50271","score":0.00793,"percentile":0.56071,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-mw54-j2v2-42hr","url":"https://osv.dev/vulnerability/GHSA-mw54-j2v2-42hr","summary":"dd-trace-py: Improper parsing of W3C baggage headers may lead to DoS","modified":"2026-09-10T03:50:12.623722840Z","packages":[{"ecosystem":"PyPI","name":"ddtrace","purl":"pkg:pypi/ddtrace","ranges":["<4.8.2"],"fixed":["4.8.2"]}]},{"id":"PYSEC-2026-3461","url":"https://osv.dev/vulnerability/PYSEC-2026-3461","summary":"dd-trace-py: Improper parsing of W3C baggage headers may lead to DoS","modified":"2026-07-23T15:00:11.420190209Z","packages":[{"ecosystem":"PyPI","name":"ddtrace","purl":"pkg:pypi/ddtrace","ranges":["<4.8.2"],"fixed":["4.8.2"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}