dd-trace-py: Improper parsing of W3C baggage headers may lead to DoS
Published Jul 17, 2026
7.5
HIGHCVSS 3.1
EPSS 0.79%
Description
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 products
-
Affected
- < 4.8.2
Default status is the baseline for the product. Each version can override it (patched versions can be marked unaffected).
| Vendor | Product | Default status | Versions |
|---|---|---|---|
| DataDog | DD-Trace-PY | unknown | Affected
|
No data.
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
References (6)
- https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-45329 Advisory
- https://github.com/DataDog/dd-trace-py/commit/9c80faa3dcfe238d008c3b3cd0b8e5dfef0aa4cd x_refsource_MISC
- https://github.com/DataDog/dd-trace-py/pull/17926 x_refsource_MISC
- https://github.com/DataDog/dd-trace-py/releases/tag/v4.8.2 x_refsource_MISC
- https://github.com/DataDog/dd-trace-py/security/advisories/GHSA-mw54-j2v2-42hr x_refsource_CONFIRM
- https://github.com/advisories/GHSA-mw54-j2v2-42hr Advisory
| Link | Providers | Tags |
|---|---|---|
| https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-45329 | Advisory | |
| https://github.com/DataDog/dd-trace-py/commit/9c80faa3dcfe238d008c3b3cd0b8e5dfef0aa4cd | x_refsource_MISC | |
| https://github.com/DataDog/dd-trace-py/pull/17926 | x_refsource_MISC | |
| https://github.com/DataDog/dd-trace-py/releases/tag/v4.8.2 | x_refsource_MISC | |
| https://github.com/DataDog/dd-trace-py/security/advisories/GHSA-mw54-j2v2-42hr | x_refsource_CONFIRM | |
| https://github.com/advisories/GHSA-mw54-j2v2-42hr | Advisory |
Change history (0)
No recorded changes yet.
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