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).

CVSS v3 8.1 HIGH

8.1^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.2 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://aws.amazon.com/security/security-bulletins/2026-142-aws/
https://github.com/aws/sagemaker-python-sdk/releases/tag/v2.257.3
https://github.com/aws/sagemaker-python-sdk/releases/tag/v3.10.0
https://github.com/aws/sagemaker-python-sdk/security/advisories/GHSA-5rx8-8fr2-f855
https://pypi.org/project/sagemaker/2.257.3/
https://pypi.org/project/sagemaker/3.10.0/

Configurations

No configuration.

History

21 Oct 2026, 20:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-21 20:17

Updated : 2026-10-30 16:17

NVD link : CVE-2026-112408

Mitre link : CVE-2026-112408

CVE.ORG link : CVE-2026-112408

JSON object : View

Products Affected

No product.

CWE

CWE-940

Improper Verification of Source of a Communication Channel

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