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CVE-2026-50270— dd-trace-java: Improper parsing of W3C baggage headers may lead to DoS

Quick assessment

Affected
DataDog dd-trace-java
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.

dd-trace-java 是 Datadog 的 Java APM（应用性能监控）客户端。在 1.62.0 版本之前，W3C baggage 提取过程未强制执行 （默认值为 64）或 （默认值为 8192），尽管这些限制在 baggage 注入（injection）阶段是生效的。一个远程未认证的 attackers 可以发送包含大量逗号分隔键值对或单个超大值的 baggage HTTP 头。在处理启用了 baggage 传播样式（propagation style）的 HTTP 服务中，解析攻击者可控的请求头时会

CVSS 7.5 · High EPSS 0.11% · P28

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 2

VendorProduct Version RangeStatus
com.datadoghq dd-java-agent < 1.62.0 affected
DataDog dd-trace-java < 1.62.0 affected
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I. Basic Information for CVE-2026-50270

Vulnerability Information
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Vulnerability Title
dd-trace-java: Improper parsing of W3C baggage headers may lead to DoS
Source: CVE Program / CVE List V5
Vulnerability Description
dd-trace-java is a Datadog APM client for Java. Prior to 1.62.0, W3C baggage extraction does not enforce DD_TRACE_BAGGAGE_MAX_ITEMS, which defaults to 64, or DD_TRACE_BAGGAGE_MAX_BYTES, which defaults to 8192, although those limits apply during baggage injection. A remote unauthenticated attacker can send a baggage HTTP header containing many comma-separated key-value pairs or a single very large value. The extraction path allocates map entries while parsing the attacker-controlled header on every request, causing unbounded CPU and memory consumption in an HTTP service where the baggage propagation style is enabled, which is the default for most affected tracers. This can cause denial of service. This issue is fixed in version 1.62.0.
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

Affected Products

Vendor Product Affected Versions CPE Subscribe
DataDog dd-trace-java < 1.62.0 -
com.datadoghq dd-java-agent < 1.62.0 -

II. Public POCs for CVE-2026-50270

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III. Intelligence Information for CVE-2026-50270

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Patches & Fixes for CVE-2026-50270 (2)

Vendor Pages for CVE-2026-50270 (1)

Other References for CVE-2026-50270 (1)

IV. Related Vulnerabilities

Same product: dd-trace-java
Same vendor: DataDog
Same weakness: CWE-770

V. Comments for CVE-2026-50270

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