high7.5
CVE-2026-50271
dd-trace-py: Improper parsing of W3C baggage headers may lead to DoS
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| pip | ddtrace | < 4.8.2 | 4.8.2 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-mw54-j2v2-42hr
- https://github.com/DataDog/dd-trace-py/security/advisories/GHSA-mw54-j2v2-42hr
- https://github.com/DataDog/dd-trace-py/commit/9c80faa3dcfe238d008c3b3cd0b8e5dfef0aa4cd
- https://github.com/DataDog/dd-trace-py/pull/17926
- https://github.com/DataDog/dd-trace-py/releases/tag/v4.8.2