Vulnerability in AWS Amazon Sagemaker Python Sdk

CVE-2026-112408

Missing verification of source of a communication channel in the default_bucket() function in Amazon SageMaker Python SDK V3 before 3.10.0 and V2 before 2.257.3 might allow remote actors to achieve code execution in the target SageMaker execution environment and obtain IAM credentials via pre-creation of a predictably named S3 bucket that the SDK uses without ownership validation. To remediate this issue, users should upgrade to Amazon SageMaker Python SDK 3.10.0 (V3) or 2.257.3 (V2).

Published · last modified .

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-112408?
CVE-2026-112408 is a high-severity vulnerability in AWS Amazon Sagemaker Python Sdk, classified under Improper Verification of Source of a Communication Channel. CVSS score: 8.1/10. Published 2026-10-21.
How severe is CVE-2026-112408?
High severity. CVSS v3 base score is 8.1 out of 10.