CVE-2026-1777

High

Description

The Amazon SageMaker Python SDK before v3.2.0 and v2.256.0 includes the ModelBuilder HMAC signing key in the cleartext response elements of the DescribeTrainingJob function. A third party with permissions to both call this API and permissions to modify objects in the Training Jobs S3 output location may have the ability to upload arbitrary artifacts which are executed the next time the Training Job is invoked.

SeverityHigh

CVSS7.2

Exploit probability—

ProductSagemaker

PublishedFeb 2, 2026

First seenFeb 2, 2026

Weakness typeCWE-319CWE-319

How to fix

Update

sagemaker3.2.0, 2.256.0 or later

Patches

Vendor advisories

aws.amazon.com/security/security-bulletins/2026-004-AWS/

Affected products

Product	Affected versions	Fixed in
sagemakerPyPI	3.0 ≤ v < 3.2.0, v < 2.256.0	3.2.0, 2.256.0

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