CVE-2026-112408— Missing bucket ownership verification in Amazon SageMaker Python SDK default_bucket()
Quick assessment
Affected
AWS Amazon SageMaker Python SDK
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
在 Amazon SageMaker Python SDK 的 函数中，版本 3.10.0 之前的 V3 版本以及版本 2.257.3 之前的 V2 版本，缺少对通信通道来源的验证。攻击者可通过预先创建 SDK 将使用的、名称可预测的 S3 存储桶（该操作未进行所有权验证），从而在目标 SageMaker 执行环境中实现远程代码执行，并获取 IAM 凭证。 为修复此问题，用户应将 Amazon SageMaker Python SDK 升级至 V3 版本的 3.10.0 或 V2 版本的 2.257.3。
Possible ATT&CK Techniques 3 AI
T1055 · Process Injection T1078 · Valid Accounts T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-112408
Vulnerability Information
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Vulnerability Title
Missing bucket ownership verification in Amazon SageMaker Python SDK default_bucket()
Source: CVE Program / CVE List V5
Vulnerability 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).
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
通信信道源的不正确验证
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| AWS | Amazon SageMaker Python SDK | 0 ~ 2.257.3 | - |
|
II. Public POCs for CVE-2026-112408
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2026-112408 (2)
Vendor Pages for CVE-2026-112408 (2)
Other References for CVE-2026-112408 (2)
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