Is CVE-2026-50277 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-50277 being exploited in the wild.

How severe is CVE-2026-50277?

High severity, with a CVSS score of 7.5, published 17 September 2026.

Which products and versions are affected?

Datadog Dd-Trace-Cpp before 2.1.0.

Is there a fix for CVE-2026-50277?

A patch was published on 2026-05-04: Fix merged in version 2.1.0 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-50277 attacked?

It is attacked over the network, in a software library.

Am I affected by CVE-2026-50277?

Check whether you run Datadog Dd-Trace-Cpp at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-50277: Datadog dd-trace-cpp denial of service in baggage header extraction

CVE-2026-50277 · Severity: high · CVSS 7.5 · Published 2026-09-17

dd-trace-cpp is Datadog's distributed tracing library for C++ applications. The library fails to enforce size limits when parsing incoming W3C baggage headers, allowing attackers to send maliciously crafted headers with many key-value pairs or very large values. This causes unbounded memory and CPU consumption on receiving services, leading to service unavailability—a significant risk for internet-facing applications relying on the tracer.

Vendors: Datadog.

Quick answers

Is CVE-2026-50277 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-50277 being exploited in the wild.
How severe is CVE-2026-50277?: High severity, with a CVSS score of 7.5, published 17 September 2026.
Which products and versions are affected?: Datadog Dd-Trace-Cpp before 2.1.0.
Is there a fix for CVE-2026-50277?: A patch was published on 2026-05-04: Fix merged in version 2.1.0 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-50277 attacked?: It is attacked over the network, in a software library.
Am I affected by CVE-2026-50277?: Check whether you run Datadog Dd-Trace-Cpp at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

The vulnerability is a denial-of-service flaw in baggage header parsing (CWE-770: allocation of resources without limits or throttling). Prior to version 2.1.0, dd-trace-cpp extracts W3C baggage headers without enforcing the DD_TRACE_BAGGAGE_MAX_ITEMS and DD_TRACE_BAGGAGE_MAX_BYTES limits that are applied during injection. An unauthenticated remote attacker can craft headers with numerous comma-separated key-value pairs or extremely large values, triggering per-request hash-map allocations and exhausting memory and CPU. Baggage extraction is enabled by default in most tracers unless explicitly disabled via DD_TRACE_PROPAGATION_STYLE configuration. The fix is available in version 2.1.0, which applies the same limits to extraction as injection.

Affected products

Datadog dd-trace-cpp before 2.1.0

Timeline

2026-09-17: disclosed
2026-05-04: patched: Fix merged in version 2.1.0

References

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