CVE-2026-27956: Coolify: Cross-team application domain enumeration via domains_by_server endpoint
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/{serveruuid}/domains?uuid={appuuid} bypasses team scoping when the optional uuid query parameter is provided. Any authenticated API user can enumerate domain names (FQDNs) of applications belonging to other teams. This vulnerability is fixed in 4.0.0-beta.464.
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.464
Event History
Frequently Asked Questions
What is the severity of CVE-2026-27956?
CVE-2026-27956 has a medium severity rating of 4.3.
How does CVE-2026-27956 affect Coolify?
CVE-2026-27956 allows authenticated users to enumerate application domains due to a bypass of team scoping.
What versions of Coolify are affected by CVE-2026-27956?
CVE-2026-27956 affects Coolify versions prior to 4.0.0-beta.464.
How do I fix CVE-2026-27956?
To fix CVE-2026-27956, update Coolify to version 4.0.0-beta.464 or later.
Who is impacted by CVE-2026-27956?
Any authenticated API user on affected versions of Coolify can be impacted by CVE-2026-27956.