What is CVE-2026-27956?

CVE-2026-27956 is a medium-severity vulnerability in Coollabsio Coolify, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 4.3/10. Published 2026-06-30.

How severe is CVE-2026-27956?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Auth bypass in Coollabsio Coolify

CVE-2026-27956

Coolify is an open-source and self-hostable tool for managing servers, applications, and databases. Prior to 4.0.0-beta.464, `GET /api/v1/servers/{server_uuid}/domains?uuid={app_uuid}` bypasses team scoping when the optional uuid query par…

Vulnerability class: IDOR (Insecure Direct Object Reference)

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.

Affected products

Coollabsio Coolify — versions < 4.0.0-beta.464

Weakness classification (CWE)

CWE-639 — Authorization Bypass Through User-Controlled Key

References

security-advisories@github.com (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-27956?: CVE-2026-27956 is a medium-severity vulnerability in Coollabsio Coolify, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 4.3/10. Published 2026-06-30.
How severe is CVE-2026-27956?: Medium severity. CVSS v3 base score is 4.3 out of 10.