CVE-2026-8596: Amazon SageMaker Python SDK 2.199.0 through 2.257.1, 3.0.0 through 3.7.1

CVE-2026-8596. CVSS 3.1 base score 7.2 (HIGH, Source advisory). EPSS 0.00802 (percentile 0.55932), scored 20-Oct-2026.

Affected technology

Amazon SageMaker Python SDK · 2.199.0 through 2.257.1, 3.0.0 through 3.7.1
AWS

Description’s affected range: 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

Component: Not specified by the source

Attack conditions (Source advisory, CVSS 4.0): Network (remote) · High privileges required · No user interaction required

What an attacker can do

Source advisory’s CVSS 4.0 assessment (base score 8.5/10) rates confidentiality impact as high; integrity and availability impact as none. The description does not specify what an attacker can achieve beyond these rated impacts.

Published 20-Oct-2026 21:22 UTC

CWE: CWE-312
CCR priority: 29.0 /100 (P4)
CVSS 3.1: 7.2 /10 · CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H · Source advisory
EPSS: 0.00802 · percentile 0.55932 · 2026-10-20
KEV: no

Provenance

NVD CVE API 2.0 · Source record · observed 2026-10-20 21:22:07.084487+00:00 UTC

Stable permalink: https://cybercodered.org/item/cve-cve-2026-8596.html