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Vulnerability record · CVE-2026-1778 · published 2 February 2026

CVE-2026-1778: Improper certificate validation vulnerability

Amazon SageMaker Python SDK before v3.1.1 or v2.256.0 disables TLS certificate verification for HTTPS connections made by the service when a Triton Python model is imported, incorrectly allowing for requests with invalid and self-signed certificates to succeed.

8.2 CVSS 4.0 High EPSS 0.25% · top 84.9% CWE-295 · Improper certificate validation Deferred
8.2CVSS 4.0 base score
0.25%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
4References
17 Jun 2026Last modified by NVD

Description

Amazon SageMaker Python SDK before v3.1.1 or v2.256.0 disables TLS certificate verification for HTTPS connections made by the service when a Triton Python model is imported, incorrectly allowing for requests with invalid and self-signed certificates to succeed.

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

LinkTags
https://aws.amazon.com/security/security-bulletins/2026-004-AWS/
https://github.com/aws/sagemaker-python-sdk/releases/tag/v2.256.0
https://github.com/aws/sagemaker-python-sdk/releases/tag/v3.1.1
https://github.com/aws/sagemaker-python-sdk/security/advisories/GHSA-62rc-f4v9-h543

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Source: NIST National Vulnerability Database (record CVE-2026-1778), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.