What is CVE-2026-50271?

CVE-2026-50271 is a high-severity vulnerability in Datadog Dd-Trace-Py, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 7.5/10. Published 2026-07-17.

How severe is CVE-2026-50271?

High severity. CVSS v3 base score is 7.5 out of 10.

Resource exhaustion in Datadog Dd-Trace-Py

CVE-2026-50271

Datadog dd-trace-py is the Datadog Python APM client. Prior to 4.8.2, Datadog tracing libraries that implement W3C baggage propagation parse incoming baggage HTTP headers without enforcing DD_TRACE_BAGGAGE_MAX_ITEMS or DD_TRACE_BAGGAGE_MAX_BYTES limits on the extract path. A remote, unauthenticated attacker can send a request whose baggage header contains an arbitrarily large number of comma-separated key-value pairs or a single very large value, causing unbounded CPU and memory consumption and enabling a remote denial of service against HTTP services with baggage propagation enabled. This issue is fixed in version 4.8.2.

EPSS: 0.008 (53.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Datadog Dd-trace-py — versions < 4.8.2

Weakness classification (CWE)

CWE-770 — Allocation of Resources Without Limits or Throttling

References

security-advisories@github.com (x_refsource_CONFIRM)
security-advisories@github.com (x_refsource_MISC)
security-advisories@github.com (x_refsource_MISC)
security-advisories@github.com (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-50271?: CVE-2026-50271 is a high-severity vulnerability in Datadog Dd-Trace-Py, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 7.5/10. Published 2026-07-17.
How severe is CVE-2026-50271?: High severity. CVSS v3 base score is 7.5 out of 10.