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CVE-2026-8596

8.5 high SSVC exploitation: none Awaiting Analysis
NVD · CVE.org

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.

Fix

Nothing published yet: no patch, vendor advisory or mitigation reference on NVD, no vendor advisory in the News for this CVE, not in CISA's KEV, no fixed package version. BaselineWatch does not guess at one.

Change history 3

  1. StatusPublished → Awaiting AnalysisNVD modified 2026-10-26 14:10
  2. StatusAwaiting Analysis → PublishedNVD modified 2026-10-20 18:20
  3. First seenCVSS 8.5NVD modified 2026-10-20 19:19

Affected (CPE criteria) 0

NVD has not attached CPE configurations yet.

References 4