CVE-2026-8596— Cleartext storage of HMAC signing key in Amazon SageMaker Python SDK ModelBuilder/Serve path
Possible ATT&CK Techniques 3AI
T1078 · Valid Accounts T1059 · Command and Scripting Interpreter T1190 · Exploit Public-Facing ApplicationAffected Version Matrix 2
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Amazon SageMaker Python SDK | AWS | 2.199.0≤ 2.257.1 | affected |
3.0.0≤ 3.7.1 | affected |
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I. Basic Information for CVE-2026-8596
Vulnerability Information
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Vulnerability Title
Cleartext storage of HMAC signing key in Amazon SageMaker Python SDK ModelBuilder/Serve path
Source: NVD (National Vulnerability Database)
Vulnerability Description
Cleartext storage of sensitive information in the ModelBuilder/Serve component in Amazon SageMaker Python SDK before v2.257.2 and v3 before v3.8.0 might allow a remote authenticated actor to extract the HMAC signing key from SageMaker API responses and forge valid integrity signatures for specially crafted model artifacts, achieving code execution in inference containers. This issue requires a remote authenticated actor with permissions to call SageMaker describe APIs and S3 write access to the model artifact path. To remediate this issue, we recommend upgrading to Amazon SageMaker Python SDK v2.257.2 or v3.8.0 and rebuild any models previously created with ModelBuilder using the updated SDK.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
敏感数据的明文存储
Source: NVD (National Vulnerability Database)
Vulnerability Title
Amazon SageMaker Python SDK 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Amazon SageMaker Python SDK是美国亚马逊（Amazon）公司的一个构件、训练和部署机器学习模型的开发者工具包。 Amazon SageMaker Python SDK v2.257.2之前版本和v3.8.0之前版本存在安全漏洞，该漏洞源于ModelBuilder/Serve组件明文存储敏感信息，可能导致远程认证攻击者从SageMaker API响应中提取HMAC签名密钥并伪造有效完整性签名，实现推理容器中的代码执行。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Amazon SageMaker Python SDK | AWS | 2.199.0 ~ 2.257.1 | - |
II. Public POCs for CVE-2026-8596
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POCPremium
Qwen3.6-35B-A3B · 7971 chars
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III. Intelligence Information for CVE-2026-8596
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Vendor Advisories for CVE-2026-8596 (2)
Vendor Pages for CVE-2026-8596 (2)
IV. Related Vulnerabilities
Same weakness: CWE-312
V. Comments for CVE-2026-8596
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