High 7.5Published Sep 17, 2026

CVE-2026-50275Datadog PHP Tracer: Improper parsing of W3C baggage headers may lead to DoS

Updated under an hour ago (2026-10-19 06:30 UTC)

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It affects DataDog dd-trace-php. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for DataDog dd-trace-php

Exploited in the last 30 days

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: 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-770
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Awaiting Analysis
Record last updated: Sep 18, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

DataDog dd-trace-php datadog:dd_trace_php (from the name)	before 1.19.2	CNA record

References

https://github.com/DataDog/dd-trace-php/security/advisories/GHSA-phwx-ww2p-cv9vx-refsource-confirm
https://github.com/DataDog/dd-trace-php/pull/3854x-refsource-misc
https://github.com/DataDog/dd-trace-php/commit/2f7987eb02e306bb62bce8ec4152dece68112f51x-refsource-misc
https://github.com/DataDog/dd-trace-php/commit/43072ccafe55a5dbdfba75a42bf316b4150ae1e5x-refsource-misc
https://github.com/DataDog/dd-trace-php/releases/tag/1.19.2x-refsource-misc
https://github.com/DataDog/dd-trace-php/releases/tag/1.20.0x-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.