by Kastro
Paper/Archive/CVE-2026-112408

CVE-2026-112408

AWS Amazon SageMaker Python SDK — Missing bucket ownership verification in Amazon SageMaker Python SDK default_bucket()

EPSS 0.7%CVSS 9.4
critical.is priorityof 100
39
CVSS 9.4 (CNA)9.4 / 10 × 3028.2Not in CISA KEV+300.0EPSS percentile 54.6.546 × 2010.9No public exploit+100.0SSVC exploitation: unknown+100.0
Description · from the CVE record

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).

Affected

ProductAffectedFixed inSource
Amazon SageMaker Python SDK< 2.257.32.257.3CNA
Amazon SageMaker Python SDK3.0.0 – < 3.10.03.10.0CNA

Scores by source

AMZN (CNA)9.4CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:N/SA:N
AMZN (CNA)8.1CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

References

patchgithub.com/aws/sagemaker-python-sdk/releases/tag/v2.257.3patchgithub.com/aws/sagemaker-python-sdk/releases/tag/v3.10.0patchpypi.org/project/sagemaker/3.10.0patchpypi.org/project/sagemaker/2.257.3advisoryaws.amazon.com/security/security-bulletins/2026-142-awswriteupgithub.com/aws/sagemaker-python-sdk/security/advisories/GHSA-5rx8-8fr2-f855