{"id":"CVE-2026-50275","state":"PUBLISHED","title":"Datadog PHP Tracer: Improper parsing of W3C baggage headers may lead to DoS","description":"The Datadog PHP Tracer provides application performance monitoring and distributed tracing for PHP. Prior to 1.19.2, ddtrace_deserialize_baggage in ext/distributed_tracing_headers.c parses incoming W3C baggage HTTP headers without enforcing DD_TRACE_BAGGAGE_MAX_ITEMS or DD_TRACE_BAGGAGE_MAX_BYTES. A remote unauthenticated client can send an arbitrarily large number of comma-separated key-value pairs or a single oversized value, causing the tracer to allocate hash-map entries and consume unbounded CPU and memory on each request. Baggage extraction is enabled by default in most affected deployments unless baggage is removed from DD_TRACE_PROPAGATION_STYLE or DD_TRACE_PROPAGATION_STYLE_EXTRACT. This issue is fixed in version 1.19.2.","publishedAt":"2026-09-17T20:04:26.605Z","updatedAt":"2026-09-18T20:08:45.062Z","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-php"],"affected":[{"vendor":"DataDog","product":"dd-trace-php","versions":[{"version":"< 1.19.2","status":"affected"}]}],"references":["https://github.com/DataDog/dd-trace-php/security/advisories/GHSA-phwx-ww2p-cv9v","https://github.com/DataDog/dd-trace-php/pull/3854","https://github.com/DataDog/dd-trace-php/commit/2f7987eb02e306bb62bce8ec4152dece68112f51","https://github.com/DataDog/dd-trace-php/commit/43072ccafe55a5dbdfba75a42bf316b4150ae1e5","https://github.com/DataDog/dd-trace-php/releases/tag/1.19.2","https://github.com/DataDog/dd-trace-php/releases/tag/1.20.0"],"weaknesses":["CWE-770"],"ingestedAt":"2026-10-29T20:12:16.098Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/50xxx/CVE-2026-50275.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-50275","state":"PUBLISHED","datePublished":"2026-09-17T20:04:26.605Z","dateUpdated":"2026-09-18T20:08:45.062Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-06-04T16:26:05.984Z"},"containers":{"cna":{"title":"Datadog PHP Tracer: Improper parsing of W3C baggage headers may lead to DoS","descriptions":[{"lang":"en","value":"The Datadog PHP Tracer provides application performance monitoring and distributed tracing for PHP. Prior to 1.19.2, ddtrace_deserialize_baggage in ext/distributed_tracing_headers.c parses incoming W3C baggage HTTP headers without enforcing DD_TRACE_BAGGAGE_MAX_ITEMS or DD_TRACE_BAGGAGE_MAX_BYTES. A remote unauthenticated client can send an arbitrarily large number of comma-separated key-value pairs or a single oversized value, causing the tracer to allocate hash-map entries and consume unbounded CPU and memory on each request. Baggage extraction is enabled by default in most affected deployments unless baggage is removed from DD_TRACE_PROPAGATION_STYLE or DD_TRACE_PROPAGATION_STYLE_EXTRACT. This issue is fixed in version 1.19.2."}],"affected":[{"vendor":"DataDog","product":"dd-trace-php","versions":[{"version":"< 1.19.2","status":"affected"}]}],"references":[{"url":"https://github.com/DataDog/dd-trace-php/security/advisories/GHSA-phwx-ww2p-cv9v","name":"https://github.com/DataDog/dd-trace-php/security/advisories/GHSA-phwx-ww2p-cv9v","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/DataDog/dd-trace-php/pull/3854","name":"https://github.com/DataDog/dd-trace-php/pull/3854","tags":["x_refsource_MISC"]},{"url":"https://github.com/DataDog/dd-trace-php/commit/2f7987eb02e306bb62bce8ec4152dece68112f51","name":"https://github.com/DataDog/dd-trace-php/commit/2f7987eb02e306bb62bce8ec4152dece68112f51","tags":["x_refsource_MISC"]},{"url":"https://github.com/DataDog/dd-trace-php/commit/43072ccafe55a5dbdfba75a42bf316b4150ae1e5","name":"https://github.com/DataDog/dd-trace-php/commit/43072ccafe55a5dbdfba75a42bf316b4150ae1e5","tags":["x_refsource_MISC"]},{"url":"https://github.com/DataDog/dd-trace-php/releases/tag/1.19.2","name":"https://github.com/DataDog/dd-trace-php/releases/tag/1.19.2","tags":["x_refsource_MISC"]},{"url":"https://github.com/DataDog/dd-trace-php/releases/tag/1.20.0","name":"https://github.com/DataDog/dd-trace-php/releases/tag/1.20.0","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":"2026-09-17T20:04:26.605Z"},"source":{"advisory":"GHSA-phwx-ww2p-cv9v","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-18T20:08:34.736084Z","id":"CVE-2026-50275","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":"2026-09-18T20:08:45.062Z"}}]}}}