dd-trace-rs: Unbounded W3C tracestate parsing may lead to DoS (CVE-2026-54788) | HOL Guard CVE

High · CVSS 7.5CVE-2026-54788GHSA-GPWF-4H98-V82Q

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

Answer in brief

CVE-2026-54788 records a High severity (CVSS 7.5) vulnerability in dd-trace-rs: Unbounded W3C tracestate parsing may lead to DoS. The current sources do not mark it as known exploited. The current feed maps DataDog/dd-trace-rs (generic), datadog-opentelemetry (rust). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 28, 2026Updated Aug 28, 2026Source checked Aug 28, 2026First seen by HOL Aug 28, 2026Material review Aug 28, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 7.5
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

CVSS is 7.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps DataDog/dd-trace-rs (generic), datadog-opentelemetry (rust). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
DataDog/dd-trace-rsgeneric	>= 0.1.0, < 0.3.3	Not reported
datadog-opentelemetryrust	>=0.1.0,<0.3.3	0.3.3

Recommended response

Check inventory. Check lockfiles and deployed manifests for DataDog/dd-trace-rs, datadog-opentelemetry.
Review the reported fix. Update datadog-opentelemetry to 0.3.3 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Aug 28, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 28, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 28, 2026

Sources and claim methodology

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.