# CVE-2026-83551: Cleartext storage of HMAC signing key in Amazon SageMaker Python SDK @step/@remote pipeline path

> CVE-2026-83551: Cleartext storage of HMAC signing key in Amazon SageMaker Python SDK @step/@remote pipeline path. CVSS 7.2 (CVSS 3.1).

Canonical: https://rewindex.com/cve/CVE-2026-83551
Last updated: 2026-09-03T16:44:01Z

- Published: 2026-09-01 18:11 UTC · Updated: 2026-09-03 16:44 UTC · Assigner: AMZN
- CVSS: 7.2 (CVSS 3.1) · Severity: High · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
- EPSS: 0.80%, 56th percentile (scored 2026-10-25)
- CISA KEV: no
- CWE: CWE-312

## 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.

## Affected vendors and products

- AWS: sagemaker-python-sdk

## Tracked companies

- [Amazon Web Services](https://rewindex.com/company/aws.md)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2026-83551)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2026-83551)
- [https://aws.amazon.com/security/security-bulletins/2026-093-aws/](https://aws.amazon.com/security/security-bulletins/2026-093-aws/)
- [https://github.com/aws/sagemaker-python-sdk/releases/tag/v2.256.0](https://github.com/aws/sagemaker-python-sdk/releases/tag/v2.256.0)
- [https://github.com/aws/sagemaker-python-sdk/releases/tag/v3.11.0](https://github.com/aws/sagemaker-python-sdk/releases/tag/v3.11.0)
- [https://github.com/aws/sagemaker-python-sdk/security/advisories/GHSA-7xmc-crrw-fv5r](https://github.com/aws/sagemaker-python-sdk/security/advisories/GHSA-7xmc-crrw-fv5r)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2026-83551 · Markdown: https://rewindex.com/cve/CVE-2026-83551.md · JSON: https://rewindex.com/api/v1/cves/CVE-2026-83551 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T05:12:11.257Z