Vulnerability · Published Sep 1, 2026 · Assigned by AMZN

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

High 7.2

In plain English

A high-severity security flaw in sagemaker-python-sdk from AWS. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.8% (higher than 57% of all known vulnerabilities).

Severity (CVSS 3.1)7.2High

Exploit odds (30 days)0.8%top 43.2% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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 products (as reported)

Vendor	Product	Versions
AWS	sagemaker-python-sdk	0 – before 3.11.00 – before 2.256.0

Weakness: CWE-312 · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

References

https://github.com/aws/sagemaker-python-sdk/releases/tag/v2.256.0 patch, release-notes
https://github.com/aws/sagemaker-python-sdk/releases/tag/v3.11.0 patch, release-notes
https://aws.amazon.com/security/security-bulletins/2026-093-aws/ vendor-advisory
https://github.com/aws/sagemaker-python-sdk/security/advisories/GHSA-7xmc-crrw-fv5r release-notes