{"id":"CVE-2026-50273","revision":null,"records":[{"revision":"0aaceb718ccc4f7399a6046d2fbcc933","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-50273","aliases":[],"title":"Datadog .NET Tracer: Improper parsing of W3C baggage headers may lead to DoS","description":"Datadog .NET Tracer is a client library for Datadog APM for .NET applications. Prior to 3.43.0, 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 on extraction, allowing a remote unauthenticated attacker to send a baggage header with many comma-separated key-value pairs or one very large value and cause unbounded CPU and memory consumption in services with baggage propagation enabled. This issue is fixed in version 3.43.0.","state":0,"publishedAt":"2026-07-17T18:01:14.533+00:00","modifiedAt":"2026-07-17T19:46:45.397+00:00","affected":[{"ecosystem":"Vendor product","name":"dd-trace-dotnet","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"DataDog\",\n                    \"product\": \"dd-trace-dotnet\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 3.43.0\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 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,"severity":"HIGH"}],"references":["https://github.com/DataDog/dd-trace-dotnet/security/advisories/GHSA-38wr-vpc7-2mp4","https://github.com/DataDog/dd-trace-dotnet/pull/8555","https://github.com/DataDog/dd-trace-dotnet/commit/38092e0d41a36decbe649e048e48ae1b1607292f","https://github.com/DataDog/dd-trace-dotnet/releases/tag/v3.43.0"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-50273","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-50273","identifiers":["CVE-2026-50273"]},"retained":false,"historicalAffected":[]},{"revision":"799e270ce5064dd88983f3224afcf4b7","observedAt":"2026-10-25T12:17:38.331+00:00","statement":{"source":"nvd","id":"CVE-2026-50273","aliases":[],"title":"Datadog .NET Tracer is a client library for Datadog APM for .NET applications. Prior to 3.43.0, Datadog tracing libraries that implement W3C baggage propagation parse incoming baggage HTTP headers without enforcing DD_TRACE_BAGGAGE_MAX_ITEM…","description":"Datadog .NET Tracer is a client library for Datadog APM for .NET applications. Prior to 3.43.0, 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 on extraction, allowing a remote unauthenticated attacker to send a baggage header with many comma-separated key-value pairs or one very large value and cause unbounded CPU and memory consumption in services with baggage propagation enabled. This issue is fixed in version 3.43.0.","state":0,"publishedAt":"2026-07-17T18:17:16.84+00:00","modifiedAt":"2026-10-24T20:10:00.137+00:00","affected":[],"metrics":[{"system":"CVSS 3.1 · security-advisories@github.com · Secondary","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5,"severity":"HIGH"}],"references":["https://github.com/DataDog/dd-trace-dotnet/commit/38092e0d41a36decbe649e048e48ae1b1607292f","https://github.com/DataDog/dd-trace-dotnet/pull/8555","https://github.com/DataDog/dd-trace-dotnet/releases/tag/v3.43.0","https://github.com/DataDog/dd-trace-dotnet/security/advisories/GHSA-38wr-vpc7-2mp4"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-50273","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Awaiting Analysis","weaknesses":["CWE-770"],"productCriteria":[],"sourceDates":{"published":"2026-07-17T18:17:16.840","lastModified":"2026-10-24T20:10:00.137"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-50273","identifiers":["CVE-2026-50273"]},"retained":false,"historicalAffected":[]},{"revision":"340629c172ab494d8765bb8da85af3a2","observedAt":"2026-10-23T16:01:25.029+00:00","statement":{"source":"osv","id":"GHSA-38wr-vpc7-2mp4","aliases":["CVE-2026-50273"],"title":"dd-trace-dotnet: Improper parsing of W3C baggage headers may lead to DoS","description":"### Impact\nDatadog tracing libraries that implement W3C baggage propagation parse incoming baggage HTTP headers without enforcing item-count or byte-size limits on the extract path. The DD_TRACE_BAGGAGE_MAX_ITEMS (default 64) and DD_TRACE_BAGGAGE_MAX_BYTES (default 8192) limits were applied only to baggage injection, not extraction. 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). The tracer allocates a hash-map entry for each pair on every request, causing unbounded CPU and memory consumption and enabling a remote Denial of Service against any HTTP service that has the baggage propagation style enabled.\nThe baggage propagation style is enabled by default in most affected tracers, so any internet-facing service that has been instrumented with an affected tracer version is exposed unless the propagation style has been explicitly narrowed.\n\n\n### Patches\nThis is resolved in version 3.43.0 and later of the `dd-trace-dotnet` library.\n\n### Workarounds\nIf users cannot upgrade immediately:\n1. Disable `baggage` extraction by removing `baggage` from `DD_TRACE_PROPAGATION_STYLE` (or `DD_TRACE_PROPAGATION_STYLE_EXTRACT` if set independently).\n2. Cap the maximum HTTP request header size at an upstream proxy or web server (for example, Apache `LimitRequestFieldSize`, Nginx `large_client_header_buffers`, Envoy `max_request_headers_kb`).\n\n### Resources\nRelated upstream advisories:\n[opentelemetry-go GHSA-mh2q-q3fh-2475](https://github.com/open-telemetry/opentelemetry-go/security/advisories/GHSA-mh2q-q3fh-2475)\n[opentelemetry-dotnet GHSA-g94r-2vxg-569j](https://github.com/open-telemetry/opentelemetry-dotnet/security/advisories/GHSA-g94r-2vxg-569j)","state":0,"publishedAt":"2026-07-15T22:59:30+00:00","modifiedAt":"2026-07-15T23:26:42.821967+00:00","affected":[{"ecosystem":"NuGet","name":"Datadog.Trace","ranges":[{"type":"ECOSYSTEM","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"3.43.0"}]}],"versions":["0.1.0","0.1.1","0.1.2","0.1.3","0.2.3-alpha","0.2.4-alpha","0.3.0-beta","0.3.1-beta","0.3.2-beta","0.4.0-beta","0.4.1-beta","0.5.0","0.5.0-beta","0.5.1-beta","0.5.2-beta","0.6.0-beta","0.7.0-beta","0.7.1-beta","0.8.0-beta","0.8.1-beta","0.8.2-beta","1.0.0","1.1.0","1.10.0","1.10.1-prerelease","1.10.2-prerelease","1.10.3-prerelease","1.11.0","1.11.1-prerelease","1.12.0","1.13.0","1.13.2","1.13.3-prerelease","1.13.4-prerelease","1.14.0","1.14.1-prerelease","1.14.2","1.15.0","1.15.1-prerelease","1.16.0","1.16.1","1.16.2","1.16.3-prerelease","1.17.0","1.17.1-prerelease","1.18.0","1.18.1-prerelease","1.18.2","1.18.3","1.19.0","1.19.1","1.19.2","1.19.3","1.19.4","1.19.5","1.19.6-prerelease","1.2.0","1.20.0","1.21.0","1.21.1","1.21.2-prerelease","1.22.0","1.22.1-prerelease","1.22.2-prerelease","1.23.0","1.24.0","1.25.0","1.25.2-prerelease","1.26.0","1.26.1","1.26.2","1.26.3","1.27.0","1.27.1","1.28.0","1.28.1-prerelease","1.28.2","1.28.3-prerelease","1.28.4","1.28.5-prerelease","1.28.6","1.28.7","1.28.8","1.29.0","1.29.1-prerelease","1.30.0","1.30.1","1.31.0","1.31.1","1.31.2","1.4.0","1.4.1","1.6.0","1.6.1","1.6.2","1.7.0","1.8.0","1.9.0","1.9.1-prerelease","2.0.0-prerelease","2.0.1","2.1.0","2.1.1","2.10.0","2.11.0","2.12.0","2.13.0","2.14.0","2.15.0","2.16.0","2.17.0","2.18.0","2.19.0","2.2.0","2.20.0","2.21.0","2.22.0","2.23.0","2.24.0","2.24.1","2.25.0","2.26.0","2.27.0","2.28.0","2.29.0","2.3.0","2.30.0","2.31.0","2.32.0","2.33.0","2.34.0","2.35.0","2.36.0","2.37.0","2.38.0","2.39.0","2.4.0","2.4.1","2.4.2","2.4.3","2.4.4","2.40.0","2.41.0","2.42.0","2.43.0","2.44.0","2.45.0","2.46.0","2.47.0","2.48.0","2.49.0","2.5.0","2.5.1","2.50.0","2.51.0","2.52.0","2.53.0","2.53.1","2.53.2","2.54.0","2.55.0","2.56.0","2.57.0","2.58.0","2.59.0","2.6.0","2.60.0","2.61.0","2.7.0","2.8.0","2.9.0","3.0.0-prerelease","3.1.0-prerelease","3.10.0","3.10.1","3.10.2","3.11.0","3.11.1","3.12.0","3.13.0","3.14.0","3.14.1","3.14.2","3.14.3","3.15.0","3.16.0","3.17.0","3.18.0","3.19.0","3.2.0","3.20.0","3.20.1","3.21.0","3.22.0","3.23.0","3.24.0","3.24.1","3.25.0","3.26.0","3.26.1","3.26.2","3.26.3","3.27.0","3.28.0","3.29.0","3.3.0","3.3.1","3.30.0","3.31.0","3.32.0","3.32.1","3.33.0","3.34.0","3.35.0","3.36.0","3.37.0","3.38.0","3.39.0","3.4.0","3.4.1","3.40.0","3.41.0","3.42.0","3.5.0","3.6.0","3.6.1","3.7.0","3.8.0","3.9.0","3.9.1"],"rawVersionEvidence":null},{"ecosystem":"NuGet","name":"Datadog.Trace.OpenTracing","ranges":[{"type":"ECOSYSTEM","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"3.43.0"}]}],"versions":["0.2.3-alpha","0.2.4-alpha","0.3.0-beta","0.3.1-beta","0.3.2-beta","0.4.0-beta","0.4.1-beta","0.5.0","0.5.0-beta","0.5.1-beta","0.5.2-beta","0.6.0-beta","0.7.0-beta","0.7.1-beta","0.8.0-beta","0.8.1-beta","0.8.2-beta","1.0.0","1.10.0","1.10.1-prerelease","1.10.3-prerelease","1.11.0","1.11.1-prerelease","1.12.0","1.13.0","1.13.4-prerelease","1.14.0","1.14.2","1.15.0","1.15.1-prerelease","1.16.0","1.16.1","1.16.2","1.16.3-prerelease","1.17.0","1.17.1-prerelease","1.18.0","1.18.1-prerelease","1.18.2","1.18.3","1.19.0","1.19.1","1.19.2","1.19.3","1.19.4","1.19.5","1.19.6-prerelease","1.2.0","1.20.0","1.21.0","1.21.1","1.21.2-prerelease","1.22.0","1.22.1-prerelease","1.22.2-prerelease","1.23.0","1.24.0","1.25.0","1.25.2-prerelease","1.26.0","1.26.1","1.26.2","1.26.3","1.27.0","1.27.1","1.28.0","1.28.1-prerelease","1.28.2","1.28.3-prerelease","1.28.4","1.28.5-prerelease","1.28.6","1.28.7","1.28.8","1.29.0","1.29.1-prerelease","1.30.0","1.30.1","1.31.0","1.31.1","1.31.2","1.4.0","1.4.1","1.6.0","1.6.1","1.6.2","1.7.0","1.8.0","1.9.0","1.9.1-prerelease","2.0.0-prerelease","2.0.1","2.1.0","2.1.1","2.10.0","2.11.0","2.12.0","2.13.0","2.14.0","2.15.0","2.16.0","2.17.0","2.18.0","2.19.0","2.2.0","2.20.0","2.21.0","2.22.0","2.23.0","2.24.0","2.24.1","2.25.0","2.26.0","2.27.0","2.28.0","2.29.0","2.3.0","2.30.0","2.31.0","2.32.0","2.33.0","2.34.0","2.35.0","2.36.0","2.37.0","2.38.0","2.39.0","2.4.0","2.4.1","2.4.2","2.4.3","2.4.4","2.40.0","2.41.0","2.42.0","2.43.0","2.44.0","2.45.0","2.46.0","2.47.0","2.48.0","2.49.0","2.5.0","2.5.1","2.50.0","2.51.0","2.52.0","2.53.0","2.53.1","2.53.2","2.54.0","2.55.0","2.56.0","2.57.0","2.58.0","2.59.0","2.6.0","2.60.0","2.61.0","2.7.0","2.8.0","2.9.0","3.0.0-prerelease","3.1.0-prerelease","3.10.0","3.10.1","3.10.2","3.11.0","3.11.1","3.12.0","3.13.0","3.14.0","3.14.1","3.14.2","3.14.3","3.15.0","3.16.0","3.17.0","3.18.0","3.19.0","3.2.0","3.20.0","3.20.1","3.21.0","3.22.0","3.23.0","3.24.0","3.24.1","3.25.0","3.26.0","3.26.1","3.26.2","3.26.3","3.27.0","3.28.0","3.29.0","3.3.0","3.3.1","3.30.0","3.31.0","3.32.0","3.32.1","3.33.0","3.34.0","3.35.0","3.36.0","3.37.0","3.38.0","3.39.0","3.4.0","3.4.1","3.40.0","3.41.0","3.42.0","3.5.0","3.6.0","3.6.1","3.7.0","3.8.0","3.9.0","3.9.1"],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V3","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"HIGH"}],"references":["https://github.com/DataDog/dd-trace-dotnet/security/advisories/GHSA-38wr-vpc7-2mp4","https://github.com/DataDog/dd-trace-dotnet"],"sourceUrl":"https://github.com/advisories/GHSA-38wr-vpc7-2mp4","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-38wr-vpc7-2mp4","identifiers":["GHSA-38wr-vpc7-2mp4","CVE-2026-50273"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. Missing entries do not establish absence of exploitation.","generation":"2026-10-27T04:23:20.6482565+00:00","complete":true,"records":1758,"lastAttemptAt":"2026-10-27T04:23:20.6482565+00:00","lastSuccessAt":"2026-10-27T04:23:21.0403366+00:00","error":null,"lastVerifiedAt":"2026-10-27T04:23:21.0403386+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null},{"source":"cve-program","scope":"Official CVE Program baseline and cumulative hourly delta; all vendors, published and rejected records","generation":"cve-187d2b72c94ceb8c4417f1032ec3109a3a3a7b730abadb561d8cdd2a96e04d27-44adb5fc4ec2447b4a14a9a186d21f635f5ab0fe59c9ca03fbd7387196ed1b95","complete":true,"records":414861,"lastAttemptAt":"2026-10-27T04:23:19.4839227+00:00","lastSuccessAt":"2026-10-27T04:23:19.4592214+00:00","error":null,"lastVerifiedAt":"2026-10-27T04:23:19.4839227+00:00","snapshotPublishedAt":"2026-10-27T03:23:47+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null},{"source":"euvd","scope":"Rolling EUVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global EUVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. No reader inventory is sent.","generation":"enrichment-43321610382942b8ad8c85917eab1546","complete":false,"records":4735,"lastAttemptAt":"2026-10-27T04:24:29.5120624+00:00","lastSuccessAt":"2026-10-24T23:18:49.862+00:00","error":"InvalidDataException","lastVerifiedAt":"2026-10-24T23:18:49.862+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":0,"expectedIdentifiers":13477},{"source":"first-epss:nuget","scope":"FIRST EPSS for explicit CVE aliases in the collected public NuGet archive. Not a global EPSS backfill.","generation":"2026-10-27T04:23:20.6482565+00:00","complete":true,"records":1093,"lastAttemptAt":"2026-10-27T04:23:20.6482565+00:00","lastSuccessAt":"2026-10-27T04:23:21.0415276+00:00","error":null,"lastVerifiedAt":"2026-10-27T04:23:21.0415281+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null},{"source":"nvd","scope":"Rolling NVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global NVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. No reader inventory is sent.","generation":"enrichment-1e75823a9a3a4b74973abff44e356610","complete":false,"records":13416,"lastAttemptAt":"2026-10-27T04:24:27.4557647+00:00","lastSuccessAt":"2026-10-27T04:24:27.452+00:00","error":null,"lastVerifiedAt":"2026-10-27T04:24:27.452+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13077,"expectedIdentifiers":13477},{"source":"osv:Go","scope":"Complete OSV Go ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"go-c3121b113ecd88f1c92ccfa0ec9757ddc8386e4c12afd2597450b815744f800a","complete":true,"records":9779,"lastAttemptAt":"2026-10-27T04:23:20.1429206+00:00","lastSuccessAt":"2026-10-26T15:37:14.3083004+00:00","error":null,"lastVerifiedAt":"2026-10-27T04:23:20.1429206+00:00","snapshotPublishedAt":"2026-10-26T14:48:41+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null},{"source":"osv:NuGet","scope":"Complete OSV NuGet ecosystem archive, including GitHub Advisory Database records; NuGet version matching only","generation":"nuget-bad5d31e7f6a5e3d338e11d8789069b63620a403f927730769688b42f768e4f6","complete":true,"records":1965,"lastAttemptAt":"2026-10-27T04:23:19.6550338+00:00","lastSuccessAt":"2026-10-26T16:35:43.1460623+00:00","error":null,"lastVerifiedAt":"2026-10-27T04:23:19.6550338+00:00","snapshotPublishedAt":"2026-10-26T16:18:29+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null},{"source":"osv:crates.io","scope":"Complete OSV crates.io ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"crates.io-a393d8fe0ae8408f3e4cab413b76047090c8e4a3c0a186c79edf33c9a3d3af95","complete":true,"records":2995,"lastAttemptAt":"2026-10-27T04:23:20.5252815+00:00","lastSuccessAt":"2026-10-26T14:35:47.9640893+00:00","error":null,"lastVerifiedAt":"2026-10-27T04:23:20.5252815+00:00","snapshotPublishedAt":"2026-10-26T14:18:55+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null},{"source":"osv:npm","scope":"Complete OSV npm ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"npm-2c2579bb03487537529e2b647fd2d9950cfc0fec1a9832dba33e322b8dcbe369","complete":true,"records":230812,"lastAttemptAt":"2026-10-27T04:23:20.0379863+00:00","lastSuccessAt":"2026-10-26T21:37:26.5810298+00:00","error":null,"lastVerifiedAt":"2026-10-27T04:23:20.0379863+00:00","snapshotPublishedAt":"2026-10-26T21:33:12+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null}]}