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.
CVE-2026-8596
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-8596
Amazon SageMaker Python SDK
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"vendor": "AWS",
"product": "Amazon SageMaker Python SDK",
"versions": [
{
"status": "affected",
"version": "2.199.0",
"versionType": "custom",
"lessThanOrEqual": "2.257.1"
},
{
"status": "affected",
"version": "3.0.0",
"versionType": "custom",
"lessThanOrEqual": "3.7.1"
}
],
"defaultStatus": "unaffected"
}
]- Related CVEs
- CVE-2026-8596
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #42484 · Revision 1
- Added to Heist Feed
- Publisher date