What is CVE-2026-42147?

CVE-2026-42147 is a medium-severity vulnerability in Coollabsio Coolify, classified under Server-Side Request Forgery (SSRF). CVSS score: 4.9/10. Published 2026-07-07.

How severe is CVE-2026-42147?

Medium severity. CVSS v3 base score is 4.9 out of 10.

SSRF in Coollabsio Coolify

CVE-2026-42147

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 conf…

Vulnerability class: SSRF (Server-Side Request Forgery)

CVSS v3 metric

CVSS v3 base score 4.9 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N.

Affected products

Coollabsio Coolify — versions < 4.0.0-beta.474

Weakness classification (CWE)

CWE-918 — Server-Side Request Forgery (SSRF)

References

security-advisories@github.com (x_refsource_CONFIRM)
security-advisories@github.com (x_refsource_MISC)
security-advisories@github.com (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-42147?: CVE-2026-42147 is a medium-severity vulnerability in Coollabsio Coolify, classified under Server-Side Request Forgery (SSRF). CVSS score: 4.9/10. Published 2026-07-07.
How severe is CVE-2026-42147?: Medium severity. CVSS v3 base score is 4.9 out of 10.