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TI-2026-37020 Aliases CVE-2026-50277

dd-trace-cpp: Improper parsing of W3C baggage headers may lead to DoS

Priority MEDIUM 40CWE-770Published · Updated

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. Impact type from CWE-770.

Summary

dd-trace-cpp is the Datadog distributed tracing library for C++. Prior to 2.1.0, dd-trace-cpp parses incoming W3C baggage headers without enforcing DD_TRACE_BAGGAGE_MAX_ITEMS or DD_TRACE_BAGGAGE_MAX_BYTES on the extraction path, even though those limits are enforced during injection. A remote unauthenticated attacker can send a header containing many comma-separated key-value pairs or one very large value, causing per-request hash-map allocation and unbounded CPU and memory consumption. Baggage extraction is enabled by default in most affected tracers unless baggage is removed from DD_TRACE_PROPAGATION_STYLE or DD_TRACE_PROPAGATION_STYLE_EXTRACT, so affected internet-facing services can be denied service. This issue is fixed in version 2.1.0.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00793 56th percentileScored 2026-11-07
Fix Fixed dd-trace-cpp (DataDog): 2.1.0

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

VendorProductAffected versionsFixed inStatusSource
DataDogdd-trace-cppbefore 2.1.02.1.0Patch availableCNA
  • dd-trace-cpp VendorDataDog Affected before 2.1.0 Fixed in 2.1.0 Patch available CNA

Remediation

  • Fix · CNA dd-trace-cpp (DataDog) Fixed in 2.1.0

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-50277

References

Other 4

  • 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
See all 28 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences