CVE-2026-116588：Datadog dd‑trace‑py URL 查詢字串正規表示式引發 ReDOS 漏洞
CVE-2026-116588 - Datadog dd-trace-py: ReDOS in URL query string obfuscation
Datadog 的 Python APM 客戶端 dd‑trace‑py 在 1.5.0 至 3.19.9 與 4.15.6 版中，預設的查詢字串混淆正規表示式會因過度回溯而導致遠端攻擊者造成 CPU 過度使用與服務不可用。
此漏洞可使遠端攻擊者造成 CPU 過度使用，導致 Datadog APM 追蹤服務不可用，升級至 3.19.9 或 4.15.6 可即時修復。
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.
Impact
Affected Products
The following products are affected by CVE-2026-116588
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
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are
affected, the information is not represented in the table below.
No affected product recoded yet
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 4.0 | HIGH | [email protected] |
Update dd-trace-py to a fixed version to resolve excessive CPU usage and service unavailability.
- Update dd-trace-py to version 3.19.9 or later.
- Update dd-trace-py to version 4.15.6 or later.
- Ensure HTTP tracing integrations are configured securely.
Here, you will find a curated list of external links that provide in-depth
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CVE-2026-116588.
While CVE identifies
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associated with the following CWEs:
Common Attack Pattern Enumeration and Classification
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approaches employed by adversaries to exploit the CVE-2026-116588
weaknesses.
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CVE-2026-116588 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-116588 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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New CVE Received by [email protected]
十月. 26, 2026
Action Type Old Value New Value Added 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. Added CVSS V4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CWE CWE-1333 Added Affected New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/116xxx/CVE-2026-116588.json">CVE-2026-116588</a> Added Reference https://github.com/DataDog/dd-trace-py/commit/63ddc3cb07d8813ded7a8b3ab5b8d0f5470e4bfd Added Reference https://github.com/DataDog/dd-trace-py/commit/83ea39845dd95bfb9b8e247c62b3d22fc5dce1ce Added Reference https://github.com/DataDog/dd-trace-py/commit/a6d73607ea45ecd67152630f64b0945556972ed8 Added Reference https://github.com/DataDog/dd-trace-py/pull/20857 Added Reference https://github.com/DataDog/dd-trace-py/pull/20862 Added Reference https://github.com/DataDog/dd-trace-py/pull/20880 Added Reference https://github.com/DataDog/dd-trace-py/releases/tag/v3.19.9 Added Reference https://github.com/DataDog/dd-trace-py/releases/tag/v4.15.6 Added Reference https://github.com/DataDog/dd-trace-py/security/advisories/GHSA-3633-r77q-h3v3
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.