{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "4.8.2"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "9c80faa3dcfe238d008c3b3cd0b8e5dfef0aa4cd"
            },
            {
              "fixed": "58d0fd22d5d203637283843f8450bcdf64959fec"
            }
          ],
          "repo": "https://github.com/datadog/dd-trace-py",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-mw54-j2v2-42hr"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-770"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/50xxx/CVE-2026-50271.json"
  },
  "details": "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.",
  "id": "CVE-2026-50271",
  "modified": "2026-08-07T11:31:17.204653312Z",
  "published": "2026-07-17T20:42:34.036Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/DataDog/dd-trace-py/releases/tag/v4.8.2"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/50xxx/CVE-2026-50271.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/DataDog/dd-trace-py/security/advisories/GHSA-mw54-j2v2-42hr"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-50271"
    },
    {
      "type": "FIX",
      "url": "https://github.com/DataDog/dd-trace-py/commit/9c80faa3dcfe238d008c3b3cd0b8e5dfef0aa4cd"
    },
    {
      "type": "FIX",
      "url": "https://github.com/DataDog/dd-trace-py/pull/17926"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "dd-trace-py: Improper parsing of W3C baggage headers may lead to DoS"
}