Cleartext storage of HMAC signing key in Amazon SageMaker Python SDK @step/@remote pipeline path (CVE-2026-83551) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-83551

Cleartext storage of HMAC signing key in Amazon SageMaker Python SDK @step/@remote pipeline path

Answer in brief

CVE-2026-83551 records a Unknown severity vulnerability in Cleartext storage of HMAC signing key in Amazon SageMaker Python SDK @step/@remote pipeline path. The current sources do not mark it as known exploited. The current feed maps AWS/sagemaker-python-sdk (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 1, 2026Updated Sep 1, 2026Source checked Sep 1, 2026First seen by HOL Sep 1, 2026Material review Sep 1, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps AWS/sagemaker-python-sdk (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
AWS/sagemaker-python-sdkgeneric	>=0 <3.11.0 \|\| >=0 <2.256.0	3.11.0, 2.256.0

Recommended response

Check inventory. Check lockfiles and deployed manifests for AWS/sagemaker-python-sdk.
Review the reported fix. Update AWS/sagemaker-python-sdk to 3.11.0 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 1, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 1, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 1, 2026

Sources and claim methodology

Upstream source description

Cleartext storage of sensitive information in the @step and @remote decorator pipeline component in Amazon SageMaker Python SDK before v3.11.0 and v2.256.0 might allow an authenticated remote user to extract the HMAC signing key from SageMaker DescribePipeline API responses and forge valid integrity signatures for specially crafted function payloads, achieving code execution in another user's pipeline execution context within the same AWS account.

Quoted source text, attributed separately from HOL analysis.