Vulnerability details
CVE-2026-112408
AWS Amazon SageMaker Python SDK
Missing bucket ownership verification in Amazon SageMaker Python SDK default_bucket()
CVSS 4.0
9.4Critical
Official 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).
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 9.4Critical | 4.0 | CVEProject cvelistV5 (CNA) (AMZN) | 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 |
| 8.1High | 3.1 | CVEProject cvelistV5 (CNA) (AMZN) | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| AWS | Amazon SageMaker Python SDK | v < 2.257.3 | CVEProject cvelistV5 (CNA) |
| AWS | Amazon SageMaker Python SDK | 3.0.0 ≤ v < 3.10.0 | CVEProject cvelistV5 (CNA) |
References and advisories
6- https://github.com/aws/sagemaker-python-sdk/releases/tag/v2.257.3 release-notespatch
- https://github.com/aws/sagemaker-python-sdk/releases/tag/v3.10.0 release-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-f855 third-party-advisory
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Details
- Published
- 2026-10-21
- Last updated
- 2026-10-30
- State
- Published
- Assigner (CNA)
- AMZN
- Kolun priority
- 28 · Low
Exploit prediction (EPSS)
0.74%
Probability of exploitation in 30 days
54.8%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- No
- Exploitation
- None
- Technical impact
- Total
Weaknesses (CWE)
- CWE-940Improper verification of source of a communication channel