CVE-2026-42147: Coolify: SSRF via S3 Storage Endpoint in testConnection()

Severity: medium (CVSS 4.9 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-07-07 · updated 2026-10-25
Weakness: CWE-918

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.

Affected products

coollabsio coolify: before 4.0.0-beta.474

References

https://github.com/coollabsio/coolify/commit/297e9c41e19958f6237919794c28c3fb1d4cda32
https://github.com/coollabsio/coolify/releases/tag/v4.0.0-beta.474
https://github.com/coollabsio/coolify/security/advisories/GHSA-pwm4-w33c-wjf3
https://github.com/coollabsio/coolify/security/advisories/GHSA-pwm4-w33c-wjf3

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