CVE-2026-116589

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.

Database specific

{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-248"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/116xxx/CVE-2026-116589.json"
}

References

Affected packages

Git / github.com/datadog/dd-trace-py

Affected ranges

Type

GIT

Repo

https://github.com/datadog/dd-trace-py

Events

Introduced

2c2e8d86814ca7a385f0adfd7bd85d88746b373e

Fixed

8da5bb7f4c9e622fba8c4c3b37bb0cc92796d6ce

Fixed

69dc19853247434ceab83e0c1c4e279a2eb2a3f7

Fixed

ace972489b57dd020ff52b706bb548a354f2dd69

Database specific

Show details

{
    "extracted_events": [
        {
            "range": [
                {
                    "introduced": "3.13.0"
                },
                {
                    "fixed": "4.15.5"
                }
            ],
            "source": "AFFECTED_FIELD",
            "strategy": "StringRangeExpression"
        },
        {
            "range": [
                {
                    "fixed": "69dc19853247434ceab83e0c1c4e279a2eb2a3f7"
                }
            ],
            "source": "REFERENCES_COMMIT"
        },
        {
            "range": [
                {
                    "fixed": "ace972489b57dd020ff52b706bb548a354f2dd69"
                }
            ],
            "source": "REFERENCES_COMMIT"
        },
        {
            "original_tag": "v4.15.5",
            "range": [
                {
                    "fixed": "8da5bb7f4c9e622fba8c4c3b37bb0cc92796d6ce"
                }
            ],
            "source": "REFERENCES_TAG"
        }
    ]
}

Database specific

source

"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-116589.json"