CVE-2025-64422 MEDIUM

CVE-2025-64422: Rate-limit bypass on login via X-Forwarded-Host header

Vendor Coollabsio
Product coolify
Weakness CWE-770 · Uncontrolled resource consumption
Published January 5, 2026
Last update January 5, 2026

CVSS base score

5.5/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality
Integrity

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P

What the vulnerability does

01Description

Coolify is an open-source and self-hostable tool for managing servers, applications, and databases. In Coolify vstarting with version 4.0.0-beta.434, the /login endpoint advertises a rate limit of 5 requests but can be trivially bypassed by rotating the X-Forwarded-For header. This enables unlimited credential stuffing and brute-force attempts against user and admin accounts. As of time of publication, it is unclear if a patch is available.

Key dates

02Disclosure timeline

January 5, 2026 CVE published
January 5, 2026 Record updated