CVE-2026-116588 Datadog dd-trace-py - Denial of Service

Datadog dd-trace-py 1.5.0 to 3.19.9 and 4.15.6 contains a denial of service caused by excessive regex backtracking in query-string obfuscation for HTTP span metadata, letting remote attackers cause service unavailability, exploit requires attacker-controlled URL query strings.

CVSS base score 8.7 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
View the NVD record ↗

Details

Type
Denial of Service
Impact
Denial Of Service
CVSS vector
CVSS:4.0/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
Published
26 October 2026
Updated
27 October 2026
Weakness
CWE-1333

Vendor fix

Upgrade to versions 3.19.9 or 4.15.6 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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