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TI-2026-80927 Aliases CVE-2026-116588GHSA-3633-r77q-h3v3

ReDoS in Datadog dd-trace-py URL query string obfuscation

Priority MEDIUM 44CWE-1333Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-1333.

Summary

Datadog dd-trace-py, the Datadog Python APM client, is affected from 1.5.0 before 3.19.9 and from 4.0.0 before 4.15.6. The default regular expression that obfuscates URL query strings can backtrack excessively (CWE-1333). A remote attacker can send crafted query strings that cause prolonged CPU consumption and service unavailability in HTTP tracing integrations, which process query strings by default.

Written with Claude Haiku 5.5 from the sources below · 2026-11-02

Description from the CNA

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00468 40th percentileScored 2026-11-07
Fix Fixed dd-trace-py (DataDog): 3.19.9, 4.15.6ddtrace (PyPI): 3.19.9, 4.15.6

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
DataDogdd-trace-py1.5.0 to before 3.19.9; 4.0.0 to before 4.15.63.19.9, 4.15.6Patch availableCNA
—ddtrace (PyPI)1.5.0 to before 3.19.93.19.9Patch availableGHSA-3633-r77q-h3v3
—ddtrace (PyPI)4.0.0 to before 4.15.64.15.6Patch availableGHSA-3633-r77q-h3v3
  • dd-trace-py VendorDataDog Affected 1.5.0 to before 3.19.9; 4.0.0 to before 4.15.6 Fixed in 3.19.9, 4.15.6 Patch available CNA
  • ddtrace (PyPI) Vendor— Affected 1.5.0 to before 3.19.9 Fixed in 3.19.9 Patch available GHSA-3633-r77q-h3v3
  • ddtrace (PyPI) Vendor— Affected 4.0.0 to before 4.15.6 Fixed in 4.15.6 Patch available GHSA-3633-r77q-h3v3

Remediation

Upgrade the ddtrace PyPI package to version 3.19.9 for the 3.x branch and to version 4.15.6 for the 4.x branch. The sources list no fixed version for dd-trace-py.

Written with Claude Haiku 5.5 from the sources below · 2026-11-02

  • Fix · CNA dd-trace-py (DataDog) Fixed in 3.19.9, 4.15.6
  • Fix · GHSA-3633-r77q-h3v3 ddtrace (PyPI) Fixed in 3.19.9 Advisory →
  • Fix · GHSA-3633-r77q-h3v3 ddtrace (PyPI) Fixed in 4.15.6 Advisory →

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-10-26 Threatist record created from CVE-2026-116588
  2. 2026-10-27 Affected versions changed · Red Hat
  3. 2026-10-27 CVSS score added · Red Hat
  4. 2026-10-27 Alias added: GHSA-3633-r77q-h3v3
  5. 2026-10-27 Priority changed: MEDIUM → LOW
  6. 2026-11-02 CISA SSVC decision points changed
  7. 2026-11-02 Priority changed: LOW → MEDIUM

References

Advisory 1

Other 10

  • TI-2026-32833 GuardDog: Blind GitHub URL rewrite in remote project scanning causes SSRF and `GH_TOKEN` exfiltration CVSS 3.1HIGH 8.2
  • TI-2022-07587 GuardDog vulnerable to arbitrary file write when scanning a specially-crafted remote PyPI package CVSS 3.1MEDIUM 6.5
  • TI-2026-26107 dd-trace-java: Unsafe deserialization in RMI instrumentation may lead to remote code execution CVSS 4.0CRITICAL 9.3
  • TI-2026-81528 ReDoS in dd-trace URL query string obfuscation CVSS 4.0HIGH 8.7
  • TI-2023-20052 import-in-the-middle allows unsanitized user controlled input in module generation CVSS 3.1CRITICAL 9.8
  • TI-2026-80928 Datadog dd-trace-py IAST flaw lets attackers crash Python processes CVSS 4.0HIGH 8.2
See all 28 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences