CVE-2026-8596

Cleartext storage of sensitive information in the ModelBuilder/Serve component in Amazon SageMaker Python SDK before v2.257.2 and v3 before v3.8.0 might allow a remote authenticated actor to extract the HMAC signing key from SageMaker API responses and forge valid integrity signatures for specially crafted model artifacts, achieving code execution in inference containers. This issue requires a remote authenticated actor with permissions to call SageMaker describe APIs and S3 write access to the model artifact path. To remediate this issue, we recommend upgrading to Amazon SageMaker Python SDK v2.257.2 or v3.8.0 and rebuild any models previously created with ModelBuilder using the updated SDK.

CVSS v3 7.2 HIGH

7.2^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.2 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required HIGH

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://aws.amazon.com/security/security-bulletins/2026-031-aws/
https://github.com/aws/sagemaker-python-sdk/releases/tag/v2.257.2
https://github.com/aws/sagemaker-python-sdk/releases/tag/v3.8.0
https://github.com/aws/sagemaker-python-sdk/security/advisories/GHSA-7hh5-prp2-mfh5

Configurations

No configuration.

History

14 May 2026, 20:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-05-14 20:17

Updated : 2026-05-15 14:10

NVD link : CVE-2026-8596

Mitre link : CVE-2026-8596

CVE.ORG link : CVE-2026-8596

JSON object : View

Products Affected

No product.

CWE

CWE-312

Cleartext Storage of Sensitive Information

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