CVE-2026-54788: CWE-770: Allocation of Resources Without Limits or Throttling in DataDog dd-trace-rs
Description
CVE-2026-54788 is a high-severity vulnerability in DataDog's dd-trace-rs Rust library for application performance monitoring. Versions from 0.1.0 up to but not including 0.3.3 parse the W3C tracestate header and collect all semicolon-separated key-value pairs in the Datadog dd=... vendor entry into a HashMap without limits. This allows a remote unauthenticated attacker to send an arbitrarily large dd=... entry, causing excessive CPU and memory consumption and resulting in denial of service. The issue is fixed in version 0.3.3.
CVSS v3.1
Score 7.5high
Affected software
DataDog
dd-trace-rs
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The dd-trace-rs library versions 0.1.0 through 0.3.2 parse the W3C tracestate header and collect every semicolon-separated key and value pair in the Datadog dd=... vendor entry into a HashMap without enforcing limits on the number of pairs or the size of entries. Since tracecontext extraction is enabled by default, a remote unauthenticated attacker can exploit this by sending a large dd=... entry, leading to excessive CPU and memory use per request and causing denial of service in services instrumented with dd-trace-rs. This vulnerability is addressed in version 0.3.3.
Potential Impact
An unauthenticated remote attacker can cause denial of service by sending specially crafted requests with large dd=... entries in the W3C tracestate header. This triggers excessive CPU and memory consumption in affected dd-trace-rs versions, potentially disrupting service availability. There is no impact on confidentiality or integrity.
Mitigation Recommendations
Upgrade dd-trace-rs to version 0.3.3 or later, where this vulnerability is fixed. No other mitigation or temporary workaround is documented. Patch status is not explicitly confirmed in the vendor advisory, but the fix is stated to be in 0.3.3.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-06-15T23:23:57.714Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a91e40aacd9273b4942e80b
Added to database: 08/28/2026, 19:39:54 UTC
Last enriched: 09/08/2026, 03:22:33 UTC
Last updated: 10/11/2026, 06:48:17 UTC
Views: 30
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