CVE-2026-2978
📋 TL;DR
CVE-2026-2978 is an unrestricted file upload vulnerability in FastApiAdmin's Scheduled Task API that allows remote attackers to upload arbitrary files without proper validation. This affects FastApiAdmin versions up to 2.2.0, potentially enabling attackers to execute malicious code on affected systems.
💻 Affected Systems
- FastApiAdmin
📦 What is this software?
Fastapiadmin by Fastapiadmin
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete system compromise, data theft, and lateral movement within the network.
Likely Case
File upload leading to web shell deployment, data manipulation, or denial of service through file system exhaustion.
If Mitigated
Limited impact with proper file validation, restricted permissions, and network segmentation in place.
🎯 Exploit Status
Public exploit available in GitHub repository, making exploitation straightforward for attackers.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: None available
Restart Required: No
Instructions:
1. Monitor FastApiAdmin repository for security updates. 2. Upgrade to version above 2.2.0 when available. 3. Review and apply any community patches from security advisories.
🔧 Temporary Workarounds
Implement File Upload Validation
allAdd server-side validation to restrict file types, extensions, and content.
# Modify upload_file_controller to validate file types and extensions
# Implement MIME type checking and file signature validation
Disable Scheduled Task API
allTemporarily disable the vulnerable API endpoint if not required.
# Comment out or remove the upload_file_controller route in FastApiAdmin configuration
🧯 If You Can't Patch
- Implement network segmentation to isolate FastApiAdmin instances from critical systems
- Deploy web application firewall (WAF) with file upload protection rules
🔍 How to Verify
Check if Vulnerable:
Check FastApiAdmin version and verify if upload_file_controller exists without proper file validation in /backend/app/api/v1/module_system/params/controller.pyCheck Version:
Check FastApiAdmin package version or review application configuration filesVerify Fix Applied:
Test file upload functionality with malicious files to ensure proper validation and rejection📡 Detection & Monitoring
Log Indicators:
- Unusual file uploads to Scheduled Task API
- Large or unexpected file types being uploaded
- Multiple failed upload attempts
Network Indicators:
- HTTP POST requests to upload endpoints with suspicious file extensions
- Unusual outbound connections after file uploads
SIEM Query:
source="fastapi-admin" AND (uri_path="/api/v1/module_system/params/upload" OR method="POST") AND file_extension IN ("php", "jsp", "asp", "exe", "sh")