CVE-2026-116589
High
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.
SeverityHigh
CVSS8.2
Exploit probability—
ProductDdtrace
PublishedOct 26, 2026
First seenOct 26, 2026
Weakness typeCWE-248CWE-248
How to fix
Update
- ddtrace4.15.5 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| ddtracePyPI | 3.13.0 ≤ v < 4.15.5 | 4.15.5 |
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