CVE-2026-112408
Missing bucket ownership verification in Amazon SageMaker Python SDK default_bucket()
- State
- Published
- Severity
- 9.4 Critical
- Published
- Oct 21, 2026
- Updated
- Oct 30, 2026
- Reserved
- Oct 19, 2026
Description
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).
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 9.4 Critical | CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:N/SA:N | AMZN |
| 3.1 | 8.1 High | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H | AMZN |
Weaknesses
- CWE-940 Improper verification of source of a communication channel
Affected Products
| Product | Versions |
|---|---|
Amazon SageMaker Python SDKAWS |
|
References
- https://github.com/aws/sagemaker-python-sdk/releases/tag/v2.257.3release-notespatch
- https://github.com/aws/sagemaker-python-sdk/releases/tag/v3.10.0release-notespatch
- https://pypi.org/project/sagemaker/3.10.0/release-notespatch
- https://pypi.org/project/sagemaker/2.257.3/release-notespatch
- https://aws.amazon.com/security/security-bulletins/2026-142-aws/vendor-advisory
- https://github.com/aws/sagemaker-python-sdk/security/advisories/GHSA-5rx8-8fr2-f855third-party-advisory
Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.