CVE-2026-116589
Datadog dd-trace-py: IAST instrumentation can lead to application DOS
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-248 |
| Vendor | datadog |
| Product | dd-trace-py |
| Published | Oct 26, 2026 |
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Affected Versions
DataDog / dd-trace-py
>= 3.13.0, < 4.15.5
References
github.com: https://github.com/DataDog/dd-trace-py/security/advisories/GHSA-p3m5-h5v9-vqj6 github.com: https://github.com/DataDog/dd-trace-py/pull/20786 github.com: https://github.com/DataDog/dd-trace-py/pull/20823 github.com: https://github.com/DataDog/dd-trace-py/commit/69dc19853247434ceab83e0c1c4e279a2eb2a3f7 github.com: https://github.com/DataDog/dd-trace-py/commit/ace972489b57dd020ff52b706bb548a354f2dd69 github.com: https://github.com/DataDog/dd-trace-py/releases/tag/v4.15.5