dd-trace-rb: Improper parsing of W3C baggage headers may lead to DoS
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-770.
Summary
dd-trace-rb is Datadog's client library for Ruby. Prior to 2.32.0, W3C baggage extraction does not enforce DD_TRACE_BAGGAGE_MAX_ITEMS, which defaults to 64, or DD_TRACE_BAGGAGE_MAX_BYTES, which defaults to 8192, although those limits apply during baggage injection. A remote unauthenticated attacker can send a baggage HTTP header containing many comma-separated key-value pairs or a single very large value. The extraction path allocates entries while parsing the attacker-controlled header on every request, causing unbounded CPU and memory consumption in an HTTP service where the baggage propagation style is enabled, which is the default for most affected tracers. This can cause denial of service. This issue is fixed in version 2.32.0.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| DataDog | dd-trace-rb | before 2.32.0 | 2.32.0 | Patch available | CNA |
| — | datadog (RubyGems) | before 2.32.0 | 2.32.0 | Patch available | GHSA-p5f6-rccc-jv98 |
- dd-trace-rb VendorDataDog Affected before 2.32.0 Fixed in 2.32.0 Patch available CNA
- datadog (RubyGems) Vendor— Affected before 2.32.0 Fixed in 2.32.0 Patch available GHSA-p5f6-rccc-jv98
Remediation
- Fix · CNA dd-trace-rb (DataDog) Fixed in 2.32.0
- Fix · GHSA-p5f6-rccc-jv98 datadog (RubyGems) Fixed in 2.32.0 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2026-50276
- 2026-10-03 Alias added: GHSA-p5f6-rccc-jv98
References
Other 5
- https://github.com/DataDog/dd-trace-rb/security/advisories/GHSA-p5f6-rccc-jv98
- https://github.com/DataDog/dd-trace-rb/pull/5672
- https://github.com/DataDog/dd-trace-rb/commit/361947090214488778ac4f144e219426ffcf92e6
- https://github.com/DataDog/dd-trace-rb/releases/tag/v2.32.0
- https://github.com/DataDog/dd-trace-rb
More DataDog vulnerabilities
- TI-2026-32833 GuardDog: Blind GitHub URL rewrite in remote project scanning causes SSRF and `GH_TOKEN` exfiltration CVSS 3.1HIGH 8.2
- TI-2022-07587 GuardDog vulnerable to arbitrary file write when scanning a specially-crafted remote PyPI package CVSS 3.1MEDIUM 6.5
- TI-2026-26107 dd-trace-java: Unsafe deserialization in RMI instrumentation may lead to remote code execution CVSS 4.0CRITICAL 9.3
- TI-2026-81528 ReDoS in dd-trace URL query string obfuscation CVSS 4.0HIGH 8.7
- TI-2026-80927 ReDoS in Datadog dd-trace-py URL query string obfuscation CVSS 4.0HIGH 8.7
- TI-2023-20052 import-in-the-middle allows unsanitized user controlled input in module generation CVSS 3.1CRITICAL 9.8
Sources
- CVE-2026-50276 · CVE Program
- CVE-2026-50276 · NVD
- FIRST EPSS
- GHSA-p5f6-rccc-jv98 · GitHub Advisory Database · CC BY 4.0
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