Rewindex/CVEs/Datadog

CVE-2026-116588: Datadog dd-trace-py: ReDOS in URL query string obfuscation

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.

CWE-1333

Tracked companies

Datadog

Mapped from the CVE’s affected-product data, NVD CPE matches, vendor advisories or package feeds. A mapping means the vendor’s software is named, not that its hosted service was exposed.

Status incidents that name it

No tracked status incident names this CVE.

Affected vendors and products

DataDog: dd-trace-py

References

• CVE record on cve.org (opens in new tab)
• NVD entry (opens in new tab)
• github.com/DataDog/dd-trace-py/commit/63ddc3cb07d8813ded7a8b3ab5b8d0f5470e4bfd (opens in new tab)
• github.com/DataDog/dd-trace-py/commit/83ea39845dd95bfb9b8e247c62b3d22fc5dce1ce (opens in new tab)
• github.com/DataDog/dd-trace-py/commit/a6d73607ea45ecd67152630f64b0945556972ed8 (opens in new tab)
• github.com/DataDog/dd-trace-py/pull/20857 (opens in new tab)
• github.com/DataDog/dd-trace-py/pull/20862 (opens in new tab)
• github.com/DataDog/dd-trace-py/pull/20880 (opens in new tab)
• github.com/DataDog/dd-trace-py/releases/tag/v3.19.9 (opens in new tab)
• github.com/DataDog/dd-trace-py/releases/tag/v4.15.6 (opens in new tab)
• github.com/DataDog/dd-trace-py/security/advisories/GHSA-3633-r77q-h3v3 (opens in new tab)

All CVEsMarkdownJSON

• CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (opens in new tab)
• This product uses data from the NVD API but is not endorsed or certified by the NVD. (opens in new tab)
• Known Exploited Vulnerabilities catalog from CISA. (opens in new tab)
• EPSS scores from FIRST (Exploit Prediction Scoring System). (opens in new tab)