{"id":"CVE-2026-50273","state":"PUBLISHED","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.","publishedAt":"2026-07-17T18:01:14.533Z","updatedAt":"2026-07-17T19:46:45.397Z","severity":{"score":7.5,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","source":"GitHub_M"},"assigner":"GitHub_M","products":["DataDog dd-trace-dotnet"],"affected":[{"vendor":"DataDog","product":"dd-trace-dotnet","versions":[{"version":"< 3.43.0","status":"affected"}]}],"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"],"weaknesses":["CWE-770"],"ingestedAt":"2026-10-29T20:12:16.098Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/50xxx/CVE-2026-50273.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-50273","state":"PUBLISHED","datePublished":"2026-07-17T18:01:14.533Z","dateUpdated":"2026-07-17T19:46:45.397Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-06-04T16:26:05.984Z"},"containers":{"cna":{"title":"Datadog .NET Tracer: Improper parsing of W3C baggage headers may lead to DoS","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"DataDog","product":"dd-trace-dotnet","versions":[{"version":"< 3.43.0","status":"affected"}]}],"references":[{"url":"https://github.com/DataDog/dd-trace-dotnet/security/advisories/GHSA-38wr-vpc7-2mp4","name":"https://github.com/DataDog/dd-trace-dotnet/security/advisories/GHSA-38wr-vpc7-2mp4","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/DataDog/dd-trace-dotnet/pull/8555","name":"https://github.com/DataDog/dd-trace-dotnet/pull/8555","tags":["x_refsource_MISC"]},{"url":"https://github.com/DataDog/dd-trace-dotnet/commit/38092e0d41a36decbe649e048e48ae1b1607292f","name":"https://github.com/DataDog/dd-trace-dotnet/commit/38092e0d41a36decbe649e048e48ae1b1607292f","tags":["x_refsource_MISC"]},{"url":"https://github.com/DataDog/dd-trace-dotnet/releases/tag/v3.43.0","name":"https://github.com/DataDog/dd-trace-dotnet/releases/tag/v3.43.0","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-770","lang":"en","description":"CWE-770: Allocation of Resources Without Limits or Throttling","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-07-17T18:01:14.533Z"},"source":{"advisory":"GHSA-38wr-vpc7-2mp4","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-07-17T19:46:28.497491Z","id":"CVE-2026-50273","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-07-17T19:46:45.397Z"}}]}}}