Vulnerability 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.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://github.com/DataDog/dd-trace-php/commit/2f7987eb02e306bb62bce8ec4152dece6
- https://github.com/DataDog/dd-trace-php/commit/43072ccafe55a5dbdfba75a42bf316b41
- https://github.com/DataDog/dd-trace-php/pull/3854
- https://github.com/DataDog/dd-trace-php/releases/tag/1.19.2
- https://github.com/DataDog/dd-trace-php/releases/tag/1.20.0
- https://github.com/DataDog/dd-trace-php/security/advisories/GHSA-phwx-ww2p-cv9v
FAQ
What is CVE-2026-50275?
CVE-2026-50275 is a vulnerability with a CVSS score of 7.5 (HIGH). 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 W3...
How severe is CVE-2026-50275?
CVE-2026-50275 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-50275?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.