High 7.5Published Aug 28, 2026

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

Updated under an hour ago (2026-10-19 08:30 UTC)

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Every CVE for DataDog dd-trace-rs

Exploited in the last 30 days

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.

CVSS: 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-770
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Deferred
Record last updated: Aug 31, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

DataDog dd-trace-rs datadog:dd_trace_rs (from the name)	from 0.1.0, < 0.3.3	CNA record

References

https://github.com/DataDog/dd-trace-rs/security/advisories/GHSA-gpwf-4h98-v82qx-refsource-confirm
https://github.com/DataDog/dd-trace-rs/pull/218x-refsource-misc
https://github.com/DataDog/dd-trace-rs/commit/77c5d185c71d0ea8103da0e6cf4cd50677ffacd2x-refsource-misc
https://github.com/DataDog/dd-trace-rs/releases/tag/datadog-opentelemetry-v0.3.3x-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.