What’s Vulnerable › Vulnerabilities

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

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-28 · updated 2026-09-09
• Weakness: 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 products

• DataDog dd-trace-rs: from 0.1.0, < 0.3.3

References

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

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