CVE-2026-1778
📋 TL;DR
This vulnerability in Amazon SageMaker Python SDK disables TLS certificate verification when importing Triton Python models, allowing HTTPS connections with invalid or self-signed certificates. This affects users of SageMaker Python SDK who import Triton models, potentially enabling man-in-the-middle attacks.
💻 Affected Systems
- Amazon SageMaker Python SDK
⚠️ Risk & Real-World Impact
Worst Case
Attackers could intercept and manipulate model data, inject malicious code into models, or steal sensitive training data through man-in-the-middle attacks.
Likely Case
Data integrity compromise during model import/export, potential data leakage if attackers intercept connections.
If Mitigated
Limited impact if network controls prevent external connections or if all endpoints use trusted certificates.
🎯 Exploit Status
Exploitation requires man-in-the-middle position between SageMaker and model source.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: v2.256.0 or v3.1.1
Vendor Advisory: https://aws.amazon.com/security/security-bulletins/2026-004-AWS/
Restart Required: No
Instructions:
1. Update SageMaker Python SDK: pip install --upgrade sagemaker>=2.256.0 or sagemaker>=3.1.1
2. Verify no code overrides TLS verification settings.
3. Test Triton model imports after update.
🔧 Temporary Workarounds
Environment variable override
allForce TLS verification via environment variable
export PYTHONHTTPSVERIFY=1
Python code workaround
allExplicitly enable TLS verification in Python code before importing models
import ssl
ssl._create_default_https_context = ssl.create_default_context
🧯 If You Can't Patch
- Restrict network access to only trusted model sources using firewalls or network policies.
- Use VPN or private endpoints for all model import connections to prevent interception.
🔍 How to Verify
Check if Vulnerable:
Check SDK version: pip show sagemaker | grep Version. If version <2.256.0 or <3.1.1, you may be vulnerable if importing Triton models.Check Version:
pip show sagemaker | grep VersionVerify Fix Applied:
After update, test importing a Triton model while monitoring network traffic for proper TLS handshake.📡 Detection & Monitoring
Log Indicators:
- Failed TLS certificate validation warnings suppressed
- HTTPS connections to untrusted sources
Network Indicators:
- HTTPS connections accepting self-signed certificates during model import
- Unusual outbound connections during SageMaker operations
SIEM Query:
source="sagemaker" AND ("certificate" OR "TLS" OR "SSL") AND ("ignore" OR "disable" OR "bypass")