CVE-2026-41899

EUVD-2026-41951 · Published Jul 6, 2026

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.

Weaknesses

CWE-770CWE-306

CVSS scores

v3.16.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L

MITRE ATT&CK

Inferred

Where this vulnerability fits in an attack

ReconImpact

Initial Access Impact

T1190Exploit Public-Facing Application T1498.001Direct Network Flood T1498.002Reflection Amplification T1499Endpoint Denial of Service T1499.001OS Exhaustion Flood T1499.002Service Exhaustion Flood T1499.003Application Exhaustion Flood

References

https://github.com/coollabsio/coolify/security/advisories/GHSA-v64c-v633-58xp
https://github.com/coollabsio/coolify/commit/371e883c75a87d82c398bf89ee8ad6387348520d
https://github.com/coollabsio/coolify/pull/9653

Potentially impacted assets

See if this affects your attack surface