CVE-2026-50275 DataDog CVE debrief

Who should care

Datadog PHP Tracer users, particularly those with exposed or internet-facing deployments, should assess their exposure and prioritize upgrading to version 1.19.2 or later. This includes operators managing affected systems, platform administrators, vulnerability management teams, and security teams responsible for monitoring and mitigating potential threats.

Why it matters

CVE-2026-50275 is a high-severity vulnerability in the Datadog PHP Tracer that allows remote unauthenticated clients to cause unbounded CPU and memory consumption. Datadog PHP Tracer users, particularly those with exposed or internet-facing deployments, should assess their exposure and prioritize upgrading to version 1.19.2 or later to mitigate this vulnerability.

• Potential for remote unauthenticated denial-of-service (DoS) attacks
• Risk of excessive resource consumption leading to performance degradation or crashes
• Need for verification of affected versions and exposure in specific deployments
• Importance of monitoring for unusual traffic patterns or resource usage

Technical summary

The Datadog PHP Tracer provides application performance monitoring and distributed tracing for PHP. Prior to version 1.19.2, the ddtrace_deserialize_baggage function in ext/distributed_tracing_headers.c does not enforce DD_TRACE_BAGGAGE_MAX_ITEMS or DD_TRACE_BAGGAGE_MAX_BYTES when parsing incoming W3C baggage HTTP headers. This allows a remote unauthenticated client to 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.

Defensive priority

Datadog PHP Tracer users should prioritize upgrading to version 1.19.2 or later to mitigate this vulnerability.

Recommended defensive actions

• Upgrade to Datadog PHP Tracer version 1.19.2 or later
• Review and adjust DD_TRACE_BAGGAGE_MAX_ITEMS and DD_TRACE_BAGGAGE_MAX_BYTES settings if necessary
• Monitor for unusual traffic patterns or excessive resource consumption
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
• Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed
• Check relevant monitoring, detection, and logs for exposed assets that need extra review

Evidence notes

The CVE record and NVD entry provide details on the vulnerability, including its description, CVSS score, and affected versions. The vulnerability is fixed in version 1.19.2 of the Datadog PHP Tracer. Users should verify their deployments and upgrade to the patched version to mitigate this vulnerability. Evidence is based on official CVE and NVD sources, with limitations on source-provided information.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.