CVE-2026-1778: Sagemaker SageMaker Python SDK Has Insecure Vulnerability

HIGH
Advisory Identifier: GHSA-62rc-f4v9-h543
Share
CVSS 5.9
CWE-295 CWE-599
Published
Advisory Summary

CVE-2026-1778 is a HIGH (CVSS 5.9) sagemaker python sdk has insecure vulnerability (CWE-295: Improper Certificate Validation) affecting Sagemaker libraries in the PyPI ecosystem. The issue involves sagemaker python sdk has insecure tls configuration. Remediation is available by upgrading affected packages to version 3.1.1, 2.256.0.

CVE-2026-1778 at a Glance

CVE Identifier CVE-2026-1778
GHSA Identifier GHSA-62rc-f4v9-h543
Severity HIGH
CVSS v3.1 Base Score 5.9
CWE Classification CWE-295: Improper Certificate Validation
Affected Product Sagemaker
Package Ecosystem PyPI
Published Date
Last Updated

Security Impact

CVSS: 5.9

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N).

Attack Vector Network (AV:N)
Attack Complexity High (AC:H)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality None (C:N)
Integrity High (I:H)
Availability None (A:N)

How to Fix CVE-2026-1778

To remediate this vulnerability, upgrade all affected Sagemaker dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

sagemaker fixed: 3.1.1 
pip install sagemaker>=3.1.1
sagemaker fixed: 2.256.0 
pip install sagemaker>=2.256.0
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

pip show sagemaker

How to Check if You Are Affected

To determine whether your Python environment is affected by CVE-2026-1778, inspect your installed packages using pip:

pip show sagemaker

Analyze the terminal output to locate any version of Sagemaker in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 3.1.1), your application is affected.

Note: The pip show sagemaker command checks currently installed packages in your active Python environment.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-295: Improper Certificate Validation, where the product does not validate, or incorrectly validates, a certificate. In Sagemaker, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

### Summary SageMaker Python SDK is an open source library for training and deploying machine learning models on Amazon SageMaker. An issue where SSL certificate verification was globally disabled in the Triton Python backend has been found. ### Impact Arbitrary Code Execution: Disabling SSL verification allows third parties to intercept HTTPS traffic and replace models or dependencies with inappropriate versions. This could lead to remote code execution in the Triton container. ### Impacted versions - SageMaker Python SDK v3 < v3.1.1 - SageMaker Python SDK v2 < v2.256.0 ### Patches This issue has been addressed in SageMaker Python SDK version [v3.1.1](https://github.com/aws/sagemaker-python-sdk/tree/1ab6d30401946e92fdbea18497675681649e0153) and [v2.256.0](https://github.com/aws/sagemaker-python-sdk/tree/a140cfcd12abfee10254cb4dea3bb10758e4321c). It is recommended to upgrade to the latest version immediately and ensure any forked or derivative code is patched to incorporate the new fixes. ### Workarounds Customers using self-signed certificates for internal model downloads should add their private Certificate Authority (CA) certificate to the container image rather than relying on the SDK’s previous insecure configuration. This opt-in approach maintains security while accommodating internal trusted domains. ### References If there are any questions or comments about this advisory, contact AWS Security via the [vulnerability reporting page](https://aws.amazon.com/security/vulnerability-reporting) or directly via email to [aws-security@amazon.com](mailto:aws-security@amazon.com). Please do not create a public GitHub issue.

CVE-2026-1778 Affected Sagemaker Versions

2 component(s)
Fixed Versions:
3.1.12.256.0
Product / Package Ecosystem Affected Versions Fixed Version
sagemaker
pypi/sagemaker
PyPI
≥ 3.0
< 3.1.1
3.1.1
sagemaker
pypi/sagemaker
PyPI
< 2.256.0
2.256.0

References

GitHub Advisory / Wiki ADVISORY
https://github.com/aws/sagemaker-python-sdk/security/advisories/GHSA-62rc-f4v9-h543
NVD — CVE-2026-1778 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-1778
Security Fix Commit FIX COMMIT
https://github.com/aws/sagemaker-python-sdk/commit/5e7a3efa7bec0a161194ffa0cef346dda93bf2c6
Sagemaker Security Information SECURITY
https://aws.amazon.com/security/security-bulletins/2026-004-AWS
Security Fix Commit FIX COMMIT
https://github.com/aws/sagemaker-python-sdk/commit/c8098958910f7db78d07037425debfd4d44a6964
Sagemaker Source Repository REPOSITORY
https://github.com/aws/sagemaker-python-sdk
Sagemaker Release RELEASE
https://github.com/aws/sagemaker-python-sdk/releases/tag/v2.256.0
Sagemaker Release RELEASE
https://github.com/aws/sagemaker-python-sdk/releases/tag/v3.1.1

Frequently Asked Questions

What is CVE-2026-1778?
CVE-2026-1778 is a security vulnerability in Sagemaker involving SageMaker Python SDK has Insecure TLS Configuration under CWE-295: Improper Certificate Validation.
Which Sagemaker versions are affected?
Affected versions include releases prior to 3.1.1, 2.256.0 across affected packages: sagemaker.
What version fixes CVE-2026-1778?
Upgrading to 3.1.1, 2.256.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is sagemaker affected?
Yes, sagemaker is affected in releases prior to 3.1.1, 2.256.0. Upgrade your dependency to 3.1.1, 2.256.0 or later.
What is the CVSS score of CVE-2026-1778?
CVE-2026-1778 has a CVSS v3.1 base score of 5.9 (HIGH) with vector string CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N.
What CWE is associated with CVE-2026-1778?
CVE-2026-1778 is classified under CWE-295: Improper Certificate Validation (The product does not validate, or incorrectly validates, a certificate.).
How can I check PyPI dependencies for CVE-2026-1778?
Run the dependency tree command: 'pip show sagemaker'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-62rc-f4v9-h543",
  "modified" : "2026-02-03T19:01:03Z",
  "published" : "2026-02-02T23:24:50Z",
  "aliases" : [ "CVE-2026-1778" ],
  "summary" : "SageMaker Python SDK has Insecure TLS Configuration",
  "details" : "### Summary\nSageMaker Python SDK is an open source library for training and deploying machine learning models on Amazon SageMaker. An issue where SSL certificate verification was globally disabled in the Triton Python backend has been found.\n\n### Impact\nArbitrary Code Execution: Disabling SSL verification allows third parties to intercept HTTPS traffic and replace models or dependencies with inappropriate versions. This could lead to remote code execution in the Triton container.\n\n### Impacted versions\n\n- SageMaker Python SDK v3 < v3.1.1\n- SageMaker Python SDK v2 < v2.256.0\n\n### Patches\nThis issue has been addressed in SageMaker Python SDK version [v3.1.1](https://github.com/aws/sagemaker-python-sdk/tree/1ab6d30401946e92fdbea18497675681649e0153) and [v2.256.0](https://github.com/aws/sagemaker-python-sdk/tree/a140cfcd12abfee10254cb4dea3bb10758e4321c). It is recommended to upgrade to the latest version immediately and ensure any forked or derivative code is patched to incorporate the new fixes.\n\n### Workarounds\nCustomers using self-signed certificates for internal model downloads should add their private Certificate Authority (CA) certificate to the container image rather than relying on the SDK’s previous insecure configuration. This opt-in approach maintains security while accommodating internal trusted domains.\n\n### References\nIf there are any questions or comments about this advisory, contact AWS Security via the [vulnerability reporting page](https://aws.amazon.com/security/vulnerability-reporting) or directly via email to [aws-security@amazon.com](mailto:aws-security@amazon.com). Please do not create a public GitHub issue.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N"
  }, {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "sagemaker"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "3.0"
      }, {
        "fixed" : "3.1.1"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "sagemaker"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "2.256.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/aws/sagemaker-python-sdk/security/advisories/GHSA-62rc-f4v9-h543"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-1778"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/aws/sagemaker-python-sdk/commit/5e7a3efa7bec0a161194ffa0cef346dda93bf2c6"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/aws/sagemaker-python-sdk/commit/c8098958910f7db78d07037425debfd4d44a6964"
  }, {
    "type" : "WEB",
    "url" : "https://aws.amazon.com/security/security-bulletins/2026-004-AWS"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/aws/sagemaker-python-sdk"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/aws/sagemaker-python-sdk/releases/tag/v2.256.0"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/aws/sagemaker-python-sdk/releases/tag/v3.1.1"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-295", "CWE-599" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-02-02T23:24:50Z",
    "nvd_published_at" : "2026-02-02T23:16:04Z"
  }
}