CVE-2026-54788

HIGH 7.5

dd-trace-rs: Unbounded W3C tracestate parsing may lead to DoS

CVSS Score

7.5

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-770
Vendor	datadog
Product	dd-trace-rs
Published	Aug 28, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Affected Versions

DataDog / dd-trace-rs

>= 0.1.0, < 0.3.3

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/DataDog/dd-trace-rs/security/advisories/GHSA-gpwf-4h98-v82q github.com: https://github.com/DataDog/dd-trace-rs/pull/218 github.com: https://github.com/DataDog/dd-trace-rs/commit/77c5d185c71d0ea8103da0e6cf4cd50677ffacd2 github.com: https://github.com/DataDog/dd-trace-rs/releases/tag/datadog-opentelemetry-v0.3.3