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

> CVE-2026-54788: dd-trace-rs: Unbounded W3C tracestate parsing may lead to DoS. CVSS 7.5 (CVSS 3.1).

Canonical: https://rewindex.com/cve/CVE-2026-54788
Last updated: 2026-09-09T21:09:13Z

- Published: 2026-08-28 16:33 UTC · Updated: 2026-09-09 21:09 UTC · Assigner: GitHub\_M
- CVSS: 7.5 (CVSS 3.1) · Severity: High · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS: 0.79%, 56th percentile (scored 2026-10-25)
- CISA KEV: no
- CWE: CWE-770

## 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.

## Affected vendors and products

- DataDog: dd-trace-rs

## Tracked companies

- [Datadog](https://rewindex.com/company/datadog.md)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2026-54788)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2026-54788)
- [https://github.com/DataDog/dd-trace-rs/commit/77c5d185c71d0ea8103da0e6cf4cd50677ffacd2](https://github.com/DataDog/dd-trace-rs/commit/77c5d185c71d0ea8103da0e6cf4cd50677ffacd2)
- [https://github.com/DataDog/dd-trace-rs/pull/218](https://github.com/DataDog/dd-trace-rs/pull/218)
- [https://github.com/DataDog/dd-trace-rs/releases/tag/datadog-opentelemetry-v0.3.3](https://github.com/DataDog/dd-trace-rs/releases/tag/datadog-opentelemetry-v0.3.3)
- [https://github.com/DataDog/dd-trace-rs/security/advisories/GHSA-gpwf-4h98-v82q](https://github.com/DataDog/dd-trace-rs/security/advisories/GHSA-gpwf-4h98-v82q)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2026-54788 · Markdown: https://rewindex.com/cve/CVE-2026-54788.md · JSON: https://rewindex.com/api/v1/cves/CVE-2026-54788 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T03:13:22.006Z