# CVE-2025-34159: Coolify Docker Compose Directive Injection in Application Deployment Workflow

Status: published. Published: 2025-08-27. Updated: 2026-11-08.

Coolify versions prior to v4.0.0-beta.420.6 are vulnerable to a remote code execution vulnerability in the application deployment workflow. The platform allows authenticated users, with low-level member privileges, to inject arbitrary Docker Compose directives during project creation. By crafting a malicious service definition that mounts the host root filesystem, an attacker can gain full root access to the underlying server.

## Remediation

- fix: The project maintainer has confirmed that this vulnerability was remediated in version 4.0.0.-beta.420.7 despite not being acknowledged in the release notes. (source: CNA: VulnCheck)
- fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: CNA: VulnCheck) — https://github.com/coollabsio/coolify/releases/tag/v4.0.0-beta.420.7

## Affected products and versions

- coolLabs Technologies / Coolify (coollabsio/coolify): ≥ 0; < 4.0.0-beta.420.7 (affected, custom). Source: CNA: VulnCheck

## Severity and prioritization

- CVSS 4.0: 9.4 (critical); CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H; source: CNA: VulnCheck

- CISA KEV: No listing in collected sources

- EPSS: 0.97% as of 2026-11-08; percentile 62.14%

- SSVC: exploitation none; automatable no; technical impact total; source ADP: CISA-ADP

- Weaknesses: CWE-94, CWE-20

## Exploit evidence

- exploit: https://github.com/Eyodav/CVE-2025-34159 (CNA: VulnCheck)

## References

- https://github.com/coollabsio/coolify/releases/tag/v4.0.0-beta.420.7 (CNA: VulnCheck; vendor-advisory, patch, release-notes)

- https://coolify.io/ (CNA: VulnCheck; product)

- https://github.com/Eyodav/CVE-2025-34159 (CNA: VulnCheck; technical-description, exploit)

## Provenance

- CNA: VulnCheck: https://www.cve.org/CVERecord?id=CVE-2025-34159; retrieved 2026-11-08; source updated 2026-11-08

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2025-34159; retrieved 2026-11-08; source updated Not reported

Revision: 04835af453b9c9459997d177a8317c84e743a25335c1eddf014facb367a83c7a

Canonical: https://y2.dev/cve/CVE-2025-34159

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