CVE-2026-50273CWE-770

Datadog .NET Tracer: Improper parsing of W3C baggage headers may lead to DoS

High · published July 17, 2026

CVSS v3.1
7.5
EPSS
1%
Percentile
55.9
In the wild
Unconfirmed
What it is

Datadog .NET Tracer is a client library for Datadog APM for .NET applications. Prior to 3.43.0, Datadog tracing libraries that implement W3C baggage propagation parse incoming baggage HTTP headers without enforcing DD_TRACE_BAGGAGE_MAX_ITEMS or DD_TRACE_BAGGAGE_MAX_BYTES on extraction, allowing a remote unauthenticated attacker to send a baggage header with many comma-separated key-value pairs or one very large value and cause unbounded CPU and memory consumption in services with baggage propagation enabled. This issue is fixed in version 3.43.0.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00793 · 55.9th percentile
Weakness
CWE-770 · Allocation of Resources Without Limits or Throttling
Published
2026-07-17T18:01Z
EPSS history
Timeline
  • 17 JUL 18:01Z
    Datadog .NET Tracer: Improper parsing of W3C baggage headers may lead to DoS
    cvelistv5