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CVE-2026-112408 Details

Description

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).

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: AMZNCVSS-B:8.1 HIGHVector:CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://aws.amazon.com/security/security-bulletins/2026-142-aws/	AMZN
https://github.com/aws/sagemaker-python-sdk/releases/tag/v2.257.3	AMZN
https://github.com/aws/sagemaker-python-sdk/releases/tag/v3.10.0	AMZN
https://github.com/aws/sagemaker-python-sdk/security/advisories/GHSA-5rx8-8fr2-f855	AMZN
https://pypi.org/project/sagemaker/2.257.3/	AMZN
https://pypi.org/project/sagemaker/3.10.0/	AMZN

see all 6 references

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-940	Improper Verification of Source of a Communication Channel	AMZN

Affected Products

No affected product data is available for this CVE.

Change History

2 change records found show changes

Date	Action	Recorded By
Oct 30, 2026	CVE Modified	CISA-ADP
Oct 21, 2026	New CVE Received	AMZN