CVE-2026-42147: Coolify: SSRF via S3 Storage Endpoint in testConnection()
Coolify is an open-source and self-hostable tool for managing servers, applications, and databases. Prior to 4.0.0-beta.474, S3 storage endpoint validation only checks URL format and testConnection() sends a server-side request to the configured endpoint, allowing an authenticated user with storage management permissions to make Coolify request internal or metadata-service URLs. This issue is fixed in version 4.0.0-beta.474.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
Coolifyto a version that resolves this vulnerability.Fixed in 4.0.0-beta.474
Event History
Frequently Asked Questions
What is the severity of CVE-2026-42147?
The severity of CVE-2026-42147 is medium, rated at 4.9.
What type of vulnerability is CVE-2026-42147?
CVE-2026-42147 is classified as a Server-Side Request Forgery (SSRF) vulnerability.
How do I fix CVE-2026-42147?
To fix CVE-2026-42147, upgrade Coolify to version 4.0.0-beta.474 or later, where the vulnerability has been addressed.
What impact does CVE-2026-42147 have on Coolify?
CVE-2026-42147 allows authenticated users to send server-side requests to potentially malicious S3 storage endpoints.
What components are affected by CVE-2026-42147?
CVE-2026-42147 affects the Coolify application prior to version 4.0.0-beta.474.