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OpenAdvisories
High · 8.7 CVE-2026-116588 EUVD-2026-110469GHSA-3633-r77q-h3v3

Datadog dd-trace-py: ReDOS in URL query string obfuscation

Published Oct 26, 2026 · Updated Nov 2, 2026 · Assigned by GitHub_M

Description

Datadog dd-trace-py is the Datadog Python APM client. From 1.5.0 until 3.19.9 and 4.15.6, the default query-string obfuscation regular expression can exhibit excessive backtracking while synchronously processing attacker-controlled URL query strings for HTTP span metadata. A remote attacker can cause prolonged CPU consumption, request latency, and service unavailability in affected HTTP tracing integrations that include query strings in URL span tags. The vulnerable processing is enabled by default for those integrations. This issue is fixed in versions 3.19.9 and 4.15.6.

Affected products

VendorProductAffectedFixed
DataDog dd-trace-py >= 1.5.0, < 3.19.9, >= 4.0.0, < 4.15.6 —

Fixed in Linux distributions

Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.

Wolfi

ReleasePackageFixed inAdvisory
Wolfi rolling datadog-agent-7.78-core-integrations +2 No fix yet —
Wolfi rolling datadog-agent-7.79-core-integrations 7.79.2-r31 —

Affected packages

EcosystemPackageAffectedFixedRecord
PyPI ddtrace >= 1.5.0, < 3.19.9 3.19.9 GHSA-3633-r77q-h3v3
PyPI ddtrace >= 4.0.0, < 4.15.6 4.15.6 GHSA-3633-r77q-h3v3

References