CVE-2026-116693: dd-trace: ReDOS in URL query string obfuscation

Severity: high (CVSS 8.7 v4.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-10-27 · updated 2026-10-30
Weakness: CWE-1333

Description

dd-trace is the Datadog APM client for Node.js. From 2.0.0 until 5.131.1 and 6.20.1, the default DD_TRACE_OBFUSCATION_QUERY_STRING_REGEXP can perform excessive backtracking on attacker-controlled URL query strings. The expression is applied synchronously while recording HTTP URL metadata, allowing a crafted request to consume excessive CPU, stall request processing, and make the instrumented application unavailable. This issue is fixed in versions 5.131.1 and 6.20.1.

Affected products

DataDog dd-trace-js: from 2.0.0, < 5.131.1; from 6.0.0, < 6.20.1

References

https://github.com/DataDog/dd-trace-js/commit/5eeee790c93036a50549056fc890028cb4c86b1b
https://github.com/DataDog/dd-trace-js/commit/cf4e68a45fa1442c9850f2086c81901258e821b8
https://github.com/DataDog/dd-trace-js/pull/10675
https://github.com/DataDog/dd-trace-js/releases/tag/v5.131.1
https://github.com/DataDog/dd-trace-js/releases/tag/v6.20.1
https://github.com/DataDog/dd-trace-js/security/advisories/GHSA-x94g-w73q-hpcw

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