CVE-2026-41899: Coolify unauthenticated feedback endpoint allows Discord webhook abuse
Coolify is an open-source and self-hostable tool for managing servers, applications, and databases. Prior to 4.0.0-beta.474, POST /api/feedback has no authentication, no rate limiting, and no input validation, allowing arbitrary content to be forwarded directly to a Discord webhook and enabling spam, content injection, and webhook abuse. This issue is fixed in version 4.0.0-beta.474.
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.474 - Compensating control
Restrict network access to the Coolify feedback endpoint (POST /api/feedback) until upgrading, to reduce the risk of unauthenticated Discord webhook abuse.
Event History
Frequently Asked Questions
What is the severity of CVE-2026-41899?
The severity of CVE-2026-41899 is medium with a score of 6.5.
How do I fix CVE-2026-41899?
To fix CVE-2026-41899, update to Coolify version 4.0.0-beta.474 or later, which includes necessary authentication and input validation.
What does CVE-2026-41899 expose users to?
CVE-2026-41899 exposes users to potential spam through unsecured Discord webhook abuse.
Is authentication required for the feedback endpoint in CVE-2026-41899?
No, the feedback endpoint in CVE-2026-41899 does not require authentication prior to version 4.0.0-beta.474.
What types of vulnerabilities are associated with CVE-2026-41899?
CVE-2026-41899 is associated with input validation vulnerabilities.