Vulnerability · Published Feb 2, 2026 · Assigned by AMZN
CVE-2026-1777Cleartext transmission of sensitive materials in aws/sagemaker-python-sdk
High 7.2
In plain English
A high-severity security flaw in SageMaker Python SDK from AWS. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 44% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| PyPI | sagemaker | 3.2.0 | GHSA-rjrp-m2jw-pv9c |
| PyPI | sagemaker | 2.256.0 | GHSA-rjrp-m2jw-pv9c |
| PyPI | sagemaker | 2.256.0, 3.2.0 | PYSEC-2026-1888 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| AWS | SageMaker Python SDK | see references |
Weakness: CWE-319 · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
References
- https://aws.amazon.com/security/security-bulletins/2026-004-AWS/ vendor-advisory
- https://github.com/aws/sagemaker-python-sdk/security/advisories/GHSA-rjrp-m2jw-pv9c third-party-advisory
- https://github.com/aws/sagemaker-python-sdk/releases/tag/v3.2.0 patch
- https://github.com/aws/sagemaker-python-sdk/releases/tag/v2.256.0 patch