CVE-2026-42147 Coolify: SSRF via S3 Storage Endpoint in testConnection()
Authenticated users can exploit S3 endpoint validation to force Coolify to make requests to internal or metadata services.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-42147?
CVE-2026-42147 is a medium-severity server-side request forgery vulnerability in coollabsio coolify, published on 7 Jul 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
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.
Weakness: CWE-918
Which versions are affected by CVE-2026-42147?
How do I fix CVE-2026-42147?
No fix has been published for CVE-2026-42147 yet. Limit exposure of the affected software until one is available.
Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.
Is CVE-2026-42147 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-42147 exists.
Sources
Also known as GHSA-pwm4-w33c-wjf3.