CVE-2026-112408 - Missing bucket ownership verification in Amazon SageMaker Python SDK default_bucket()
Bulletin ID: 2026-142-AWS Scope: AWS Content Type: Important (requires attention) Publication Date: 10/21/2026 12:30 PM PDT Description: The Amazon SageMaker Python SDK is an open-source library for training and deploying machine learning models on Amazon SageMaker. We identified CVE-2026-112408, an issue in the default_bucket() function. The SDK uses a predictably named Amazon S3 bucket and does not check that the caller's AWS account owns it. A remote actor who creates that bucket first could achieve code execution in a remote SageMaker execution environment and obtain IAM credentials. Impacted versions: - V2: - V3: >= 3.0.0 and Please refer to the article below for the most up-to-date and
Read at AWS Security Bulletins
- Vendor
- Amazon Web Services
- Product
- AWS services
- Exposure class
- Cloud platform
Why it ranks 25 (Notable)
- Product class: cloud platform
- Widely deployed vendor product (Amazon Web Services)
- Covered by 2 independent sources
- Vendor security advisory
- Recency: items published within 24 hours gain 15, within 72 hours 6, within 7 days 2.
Links
- AWS Security Bulletins (aws.amazon.com)
- CVE-2026-112408 on this site · NVD · CVE.org · Vulnpedia
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