Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-50273— Datadog .NET Tracer: Improper parsing of W3C baggage headers may lead to DoS

Quick assessment

Affected
DataDog dd-trace-dotnet
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Datadog dd-trace-dotnet是Datadog公司的一款.NET平台的追踪工具。 Datadog dd-trace-dotnet 3.43.0之前版本存在资源管理错误漏洞，该漏洞源于未对W3C baggage传播中提取的baggage HTTP头强制实施DD_TRACE_BAGGAGE_MAX_ITEMS或DD_TRACE_BAGGAGE_MAX_BYTES限制，允许远程未认证攻击者发送包含大量逗号分隔键值对或单个极大值的baggage头，导致启用baggage传播的服务出现无限制的CPU

CVSS 7.5 · High EPSS 0.79% · P55

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking

Affected Version Matrix 1

VendorProduct Version RangeStatus
DataDog dd-trace-dotnet < 3.43.0 affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-50273

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Datadog .NET Tracer: Improper parsing of W3C baggage headers may lead to DoS
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
不加限制或调节的资源分配
Source: CVE Program / CVE List V5
Vulnerability Title
Datadog dd-trace-dotnet 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Datadog dd-trace-dotnet是Datadog公司的一款.NET平台的追踪工具。 Datadog dd-trace-dotnet 3.43.0之前版本存在资源管理错误漏洞，该漏洞源于未对W3C baggage传播中提取的baggage HTTP头强制实施DD_TRACE_BAGGAGE_MAX_ITEMS或DD_TRACE_BAGGAGE_MAX_BYTES限制，允许远程未认证攻击者发送包含大量逗号分隔键值对或单个极大值的baggage头，导致启用baggage传播的服务出现无限制的CPU
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
DataDog dd-trace-dotnet < 3.43.0 -

II. Public POCs for CVE-2026-50273

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-50273

请登录查看更多情报信息。

Patches & Fixes for CVE-2026-50273 (2)

Vendor Advisories for CVE-2026-50273 (1)

Vendor Pages for CVE-2026-50273 (1)

Same Patch Batch · DataDog · 2026-07-17 · 4 CVEs total

CVE-2026-50272 7.5 HIGH dd-trace: Improper parsing of W3C baggage headers may lead to DoS
CVE-2026-50274 7.5 HIGH dd-trace-go: Improper parsing of W3C baggage headers may lead to DoS
CVE-2026-50271 7.5 HIGH dd-trace-py: Improper parsing of W3C baggage headers may lead to DoS

IV. Related Vulnerabilities

Same vendor: DataDog
Same weakness: CWE-770

V. Comments for CVE-2026-50273

No comments yet

Leave a comment