CVE-2026-41899: Coolify unauthenticated feedback endpoint allows Discord webhook abuse

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-07-06 · updated 2026-10-25
Weakness: CWE-306

Description

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 products

coollabsio coolify: before 4.0.0-beta.474

References

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

Get alerted when CVE-2026-41899 or the next vulnerability affects your stack