---
id: CVE-2026-50275
title: >-
  The Datadog PHP Tracer provides application performance monitoring and
  distributed tracing for PHP
summary: >-
  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 enforc…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-770
vendor: DataDog
product: dd-trace-php
affected:
  - dd-trace-php < 1.19.2
published: '2026-09-17'
updated: '2026-09-23'
sourceUpdated: '2026-09-23T18:12:04.247'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-50275'
references:
  - url: >-
      https://github.com/DataDog/dd-trace-php/commit/2f7987eb02e306bb62bce8ec4152dece68112f51
    label: security-advisories@github.com
  - url: >-
      https://github.com/DataDog/dd-trace-php/commit/43072ccafe55a5dbdfba75a42bf316b4150ae1e5
    label: security-advisories@github.com
  - url: 'https://github.com/DataDog/dd-trace-php/pull/3854'
    label: security-advisories@github.com
  - url: 'https://github.com/DataDog/dd-trace-php/releases/tag/1.19.2'
    label: security-advisories@github.com
  - url: 'https://github.com/DataDog/dd-trace-php/releases/tag/1.20.0'
    label: security-advisories@github.com
  - url: >-
      https://github.com/DataDog/dd-trace-php/security/advisories/GHSA-phwx-ww2p-cv9v
    label: security-advisories@github.com
tags:
  - nvd
  - cve.org
epss: 0.00684
epssPercentile: 0.50524
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-09-18T20:08:34.736084Z'
ingestedAt: '2026-09-17T20:28:02.784Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.