{"cve":"CVE-2026-8596","nvd":{"published":"2026-05-14T20:17:21.183","modified":"2026-10-26T14:10:00.130","status":"Awaiting Analysis","description":"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.\n\n\n\nTo 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.","cvss_v4":{"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/SC:H/SI:H/SA:H","score":8.5},"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","score":7.2},"cwes":["CWE-312"],"references":["https://aws.amazon.com/security/security-bulletins/2026-031-aws/","https://github.com/aws/sagemaker-python-sdk/releases/tag/v2.257.2","https://github.com/aws/sagemaker-python-sdk/releases/tag/v3.8.0","https://github.com/aws/sagemaker-python-sdk/security/advisories/GHSA-7hh5-prp2-mfh5"],"products":[],"source":"nvd","synced_at":"2026-10-26T14:27:29.784594657+00:00"},"epss":{"cve":"CVE-2026-8596","score":0.00607,"percentile":0.48724,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-7hh5-prp2-mfh5","url":"https://osv.dev/vulnerability/GHSA-7hh5-prp2-mfh5","summary":"Cleartext storage of HMAC signing key in Amazon SageMaker Python SDK ModelBuilder/Serve path","modified":"2026-07-13T16:43:22.955709156Z","packages":[{"ecosystem":"PyPI","name":"sagemaker","purl":"pkg:pypi/sagemaker","ranges":[">=2.199.0 <2.257.2"],"fixed":["2.257.2"]},{"ecosystem":"PyPI","name":"sagemaker","purl":"pkg:pypi/sagemaker","ranges":[">=3.0.0 <3.8.0"],"fixed":["3.8.0"]}]},{"id":"PYSEC-2026-3059","url":"https://osv.dev/vulnerability/PYSEC-2026-3059","summary":"Cleartext storage of HMAC signing key in Amazon SageMaker Python SDK ModelBuilder/Serve path","modified":"2026-07-13T16:31:47.330922922Z","packages":[{"ecosystem":"PyPI","name":"sagemaker","purl":"pkg:pypi/sagemaker","ranges":[">=2.199.0 <2.257.2",">=3.0.0 <3.8.0"],"fixed":["2.257.2","3.8.0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}