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CVE-2026-54788— dd-trace-rs: Unbounded W3C tracestate parsing may lead to DoS

Quick assessment

Affected
DataDog dd-trace-rs
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-rs是Datadog公司的一个分布式追踪的Rust库。 Datadog dd-trace-rs 0.1.0版本至0.3.3之前版本存在资源管理错误漏洞，该漏洞源于解析W3C tracestate头时未限制Datadog dd=...条目中的键值对数量和条目大小，可能导致远程未认证攻击者发送任意大的dd=...条目，造成过度CPU和内存消耗，导致拒绝服务。

CVSS 7.5 · High EPSS 0.79% · P55

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 1

VendorProduct Version RangeStatus
DataDog dd-trace-rs >= 0.1.0, < 0.3.3 affected
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I. Basic Information for CVE-2026-54788

Vulnerability Information
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Vulnerability Title
dd-trace-rs: Unbounded W3C tracestate parsing may lead to DoS
Source: CVE Program / CVE List V5
Vulnerability Description
dd-trace-rs provides Datadog application performance monitoring for Rust. From 0.1.0 until 0.3.3, datadog-opentelemetry/src/propagation/tracecontext.rs parses the W3C tracestate header and collects every semicolon-separated key and value pair in the Datadog dd=... vendor entry into a HashMap without enforcing a pair count or entry size limit. Because tracecontext extraction is enabled by default, a remote unauthenticated attacker can send an arbitrarily large dd=... entry and force excessive CPU and memory consumption for each request, causing denial of service in an instrumented network service. This vulnerability is fixed in 0.3.3.
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-rs 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Datadog dd-trace-rs是Datadog公司的一个分布式追踪的Rust库。 Datadog dd-trace-rs 0.1.0版本至0.3.3之前版本存在资源管理错误漏洞，该漏洞源于解析W3C tracestate头时未限制Datadog dd=...条目中的键值对数量和条目大小，可能导致远程未认证攻击者发送任意大的dd=...条目，造成过度CPU和内存消耗，导致拒绝服务。
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-rs >= 0.1.0, < 0.3.3 -

II. Public POCs for CVE-2026-54788

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III. Intelligence Information for CVE-2026-54788

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Patches & Fixes for CVE-2026-54788 (2)

Vendor Advisories for CVE-2026-54788 (1)

IV. Related Vulnerabilities

Same vendor: DataDog
Same weakness: CWE-770

V. Comments for CVE-2026-54788

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