CVE-2026-116588
Datadog dd-trace-py: ReDOS in URL query string obfuscation
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-1333 |
| Vendor | datadog |
| Product | dd-trace-py |
| Published | Oct 26, 2026 |
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Affected Versions
DataDog / dd-trace-py
>= 1.5.0, < 3.19.9 >= 4.0.0, < 4.15.6
References
github.com: https://github.com/DataDog/dd-trace-py/security/advisories/GHSA-3633-r77q-h3v3 github.com: https://github.com/DataDog/dd-trace-py/pull/20857 github.com: https://github.com/DataDog/dd-trace-py/pull/20862 github.com: https://github.com/DataDog/dd-trace-py/pull/20880 github.com: https://github.com/DataDog/dd-trace-py/commit/63ddc3cb07d8813ded7a8b3ab5b8d0f5470e4bfd github.com: https://github.com/DataDog/dd-trace-py/commit/83ea39845dd95bfb9b8e247c62b3d22fc5dce1ce github.com: https://github.com/DataDog/dd-trace-py/commit/a6d73607ea45ecd67152630f64b0945556972ed8 github.com: https://github.com/DataDog/dd-trace-py/releases/tag/v3.19.9 github.com: https://github.com/DataDog/dd-trace-py/releases/tag/v4.15.6