What is CVE-2026-1778?

CVE-2026-1778 is a medium-severity vulnerability in AWS Sagemaker Python Sdk, classified under Improper Certificate Validation. CVSS score: 5.9/10. Published 2026-02-02.

How severe is CVE-2026-1778?

Medium severity. CVSS v3 base score is 5.9 out of 10.

Vulnerability in AWS Sagemaker Python Sdk

CVE-2026-1778

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.

Vulnerability class: Improper Certificate Validation

Published 2026-02-02 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N.

EPSS exploit prediction

EPSS: 0.003 (15.1th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 15th percentile — 15.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.000

Affected products

AWS Sagemaker Python Sdk — versions 3.1.1, 2.256.0

Weakness classification (CWE)

CWE-295 — Improper Certificate Validation

References

ff89ba41-3aa1-4d27-914a-91399e9639e5 (vendor-advisory)
ff89ba41-3aa1-4d27-914a-91399e9639e5 (third-party-advisory)
ff89ba41-3aa1-4d27-914a-91399e9639e5 (patch)
ff89ba41-3aa1-4d27-914a-91399e9639e5 (patch)

Frequently asked questions

What is CVE-2026-1778?: CVE-2026-1778 is a medium-severity vulnerability in AWS Sagemaker Python Sdk, classified under Improper Certificate Validation. CVSS score: 5.9/10. Published 2026-02-02.
How severe is CVE-2026-1778?: Medium severity. CVSS v3 base score is 5.9 out of 10.