CVE-2026-8596

May 15, 2026, 2:10 p.m.

8.5
High

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.

Product(s) Impacted

Vendor Product Versions
Amazon
  • Sagemaker Python Sdk
  • 2.257.2, 3.8.0

Weaknesses

Common security weaknesses mapped to this vulnerability.

CWE-312
Cleartext Storage of Sensitive Information
The product stores sensitive information in cleartext within a resource that might be accessible to another control sphere.

*CPE(s)

Affected systems and software identified for this CVE.

Type Vendor Product Version Update Edition Language Software Edition Target Software Target Hardware Other Information
a amazon sagemaker_python_sdk 2.257.2 / / / / / / /
a amazon sagemaker_python_sdk 3.8.0 / / / / / / /

References

https://aws.amazon.com/security/security-bulletins/2026-031-aws/
https://github.com/aws/sagemaker-python-sdk/releases/tag/v2.257.2
https://github.com/aws/sagemaker-python-sdk/releases/tag/v3.8.0
https://github.com/aws/sagemaker-python-sdk/security/advisories/GHSA-7hh5-prp2-mfh5

Tags

CWE-312
ff89ba41-3aa1-4d27-914a-91399e9639e5
2026-05-14
CVE-2026-8596

CVSS Score

8.5 / 10

CVSS Data - 4.0

  • Attack Vector: NETWORK
  • Attack Complexity: LOW
  • Attack Requirements: NONE
  • Privileges Required: HIGH
  • User Interaction: NONE
  • Scope:
  • Confidentiality Impact: HIGH
  • Integrity Impact: NONE
  • Availability Impact: NONE
  • Exploit Maturity: NOT_DEFINED

    • CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

    View Vector String

Timeline

Published: May 14, 2026, 8:17 p.m.
Last Modified: May 15, 2026, 2:10 p.m.

Status : Awaiting Analysis

CVE has been recently published to the CVE List and has been received by the NVD.

More info

Source

ff89ba41-3aa1-4d27-914a-91399e9639e5

*Disclaimer: Some vulnerabilities do not have an associated CPE. To enhance the data, we use AI to infer CPEs based on CVE details. This is an automated process and might not always be accurate.