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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.

PUBLISHED Reserved 2026-02-02 | Published 2026-02-02 | Updated 2026-02-04 | Assigner AMZN




HIGH: 7.2CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

HIGH: 8.5CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/SC:H/SI:H/SA:H

Problem types

CWE-319 Cleartext Transmission of Sensitive Information

Product status

Default status
unaffected

3.2.0
unaffected

2.256.0
unaffected

References

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

github.com/...on-sdk/security/advisories/GHSA-rjrp-m2jw-pv9c third-party-advisory

github.com/aws/sagemaker-python-sdk/releases/tag/v3.2.0 patch

github.com/aws/sagemaker-python-sdk/releases/tag/v2.256.0 patch

cve.org (CVE-2026-1777)

nvd.nist.gov (CVE-2026-1777)

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