High 8.2Published Oct 26, 2026

CVE-2026-116589Datadog dd-trace-py: IAST instrumentation can lead to application DOS

Updated under an hour ago (Oct 28, 2026, 4:40 PM ET)

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Every CVE for DataDog dd-trace-py

Exploited in the last 30 days

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.

CVSS: 8.2 HIGH (v4.0, CNA)CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Weakness (CWE): CWE-248
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Awaiting Analysis
Record last updated: Oct 26, 2026
First seen by InfoSec Signals: Oct 26, 2026

Affected products

Affected products

DataDog dd-trace-py datadog:dd_trace_py (from the name)	from 3.13.0, < 4.15.5	CNA record

References

References

https://github.com/DataDog/dd-trace-py/security/advisories/GHSA-p3m5-h5v9-vqj6	x-refsource-confirm
https://github.com/DataDog/dd-trace-py/pull/20786	x-refsource-misc
https://github.com/DataDog/dd-trace-py/pull/20823	x-refsource-misc
https://github.com/DataDog/dd-trace-py/commit/69dc19853247434ceab83e0c1c4e279a2eb2a3f7	x-refsource-misc
https://github.com/DataDog/dd-trace-py/commit/ace972489b57dd020ff52b706bb548a354f2dd69	x-refsource-misc
https://github.com/DataDog/dd-trace-py/releases/tag/v4.15.5	x-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.