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CVE-2026-50276— dd-trace-rb: Improper parsing of W3C baggage headers may lead to DoS

Quick assessment

Affected
DataDog dd-trace-rb
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-rb 是 Datadog 的 Ruby 客户端库。在 2.32.0 版本之前，W3C baggage 提取过程未强制应用 （默认值为 64）或 （默认值为 8192）的限制，尽管这些限制在 baggage 注入时是生效的。远程未认证的攻击者可以发送包含大量逗号分隔的键值对或单个极大值的 baggage HTTP 头部。在启用了 baggage 传播风格（这是大多数受影响追踪器的默认设置）的 HTTP 服务中，提取路径会在每个请求中解析攻击者控制的头部并分配条目，从而导致无限制的 CPU 和内存消耗

CVSS 7.5 · High EPSS 0.11% · P28

Possible ATT&CK Techniques 1 AI

T1499.001 · OS Exhaustion Flood

Affected Version Matrix 1

VendorProduct Version RangeStatus
DataDog dd-trace-rb < 2.32.0 affected
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I. Basic Information for CVE-2026-50276

Vulnerability Information
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Vulnerability Title
dd-trace-rb: Improper parsing of W3C baggage headers may lead to DoS
Source: CVE Program / CVE List V5
Vulnerability Description
dd-trace-rb is Datadog's client library for Ruby. Prior to 2.32.0, 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 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 2.32.0.
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-rb < 2.32.0 -

II. Public POCs for CVE-2026-50276

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III. Intelligence Information for CVE-2026-50276

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Patches & Fixes for CVE-2026-50276 (2)

Vendor Advisories for CVE-2026-50276 (1)

Vendor Pages for CVE-2026-50276 (1)

IV. Related Vulnerabilities

Same vendor: DataDog
Same weakness: CWE-770

V. Comments for CVE-2026-50276

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