cyfenced.com →

[ CVE-2026-116589 · Published 26 Oct 2026 ]

Datadog dd-trace-py: IAST instrumentation can lead to application DOS

CVSS 8.2 EPSS <1%Fix available

[ Description ]Official description

Datadog dd-trace-py is the Datadog Python APM client. From 3.13.0 until 4.15.5, the IAST string-processing instrumentation does not properly handle certain internal errors while old-style % string formatting processes attacker-controlled input. An unhandled error can terminate the Python process and interrupt the work it is handling. Exploitation requires IAST to be enabled, which is not the default, and application code to apply the affected formatting operation to attacker-controlled input. This issue is fixed in version 4.15.5.

[ Fixes ]Fixes and patches

  • ddtrace 4.15.5Fixed version · GitHub Advisories · pip package ddtrace: upgrade to 4.15.5 or later (affected >= 3.13.0, < 4.15.5)

[ Packages ]Affected open-source packages

[ References ]References