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CVE Vulnerability Details :
CVE-2026-8596
PUBLISHED
More InfoOfficial Page
Assigner-AMZN
Assigner Org ID-ff89ba41-3aa1-4d27-914a-91399e9639e5
View Known Exploited Vulnerability (KEV) details
Published At-14 May, 2026 | 19:35
Updated At-16 May, 2026 | 03:56
Rejected At-
▼CVE Numbering Authority (CNA)
Cleartext storage of HMAC signing key in Amazon SageMaker Python SDK ModelBuilder/Serve path

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.

Affected Products
Vendor
Amazon SageMaker Python SDK
Product
AWS
Default Status
unaffected
Versions
Affected
  • From 2.199.0 through 2.257.1 (custom)
  • From 3.0.0 through 3.7.1 (custom)
Problem Types
TypeCWE IDDescription
CWECWE-312CWE-312 Cleartext storage of sensitive information
Type: CWE
CWE ID: CWE-312
Description: CWE-312 Cleartext storage of sensitive information
Metrics
VersionBase scoreBase severityVector
3.17.2HIGH
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
4.08.5HIGH
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
Version: 3.1
Base score: 7.2
Base severity: HIGH
Vector:
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Version: 4.0
Base score: 8.5
Base severity: HIGH
Vector:
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
Metrics Other Info
Impacts
CAPEC IDDescription
CAPEC-586CAPEC-586 Object Injection
CAPEC ID: CAPEC-586
Description: CAPEC-586 Object Injection
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://github.com/aws/sagemaker-python-sdk/releases/tag/v2.257.2
patch
https://github.com/aws/sagemaker-python-sdk/releases/tag/v3.8.0
patch
https://aws.amazon.com/security/security-bulletins/2026-031-aws/
vendor-advisory
https://github.com/aws/sagemaker-python-sdk/security/advisories/GHSA-7hh5-prp2-mfh5
third-party-advisory
Hyperlink: https://github.com/aws/sagemaker-python-sdk/releases/tag/v2.257.2
Resource:
patch
Hyperlink: https://github.com/aws/sagemaker-python-sdk/releases/tag/v3.8.0
Resource:
patch
Hyperlink: https://aws.amazon.com/security/security-bulletins/2026-031-aws/
Resource:
vendor-advisory
Hyperlink: https://github.com/aws/sagemaker-python-sdk/security/advisories/GHSA-7hh5-prp2-mfh5
Resource:
third-party-advisory
▼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
Details not found