CVE-2026-84694: Coolify command injection in Docker SSH environment variables

CVE-2026-84694 · Severity: high · CVSS 8.8 · Published 2026-09-02

Coolify is a self-hosted platform-as-a-service tool for deploying applications and services. Authenticated users can inject malicious shell commands through improperly escaped environment variable names in Docker commands executed on managed servers, allowing them to gain unauthorized code execution on the host system outside of container sandboxing.

Quick answers

Is CVE-2026-84694 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-84694 being exploited in the wild.
How severe is CVE-2026-84694?
High severity, with a CVSS score of 8.8, published 2 September 2026.
Which products and versions are affected?
Coolify Coolify before 4.2.0.
Is there a fix for CVE-2026-84694?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-84694 attacked?
It is attacked over the network, in a hosted service.
Am I affected by CVE-2026-84694?
Check whether anything you run is named in the advisory. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

The vulnerability is a shell command injection flaw in Coolify's Docker command execution layer. When executing Docker commands over SSH on managed servers, Coolify fails to properly escape environment variable key names, allowing authenticated attackers to inject shell metacharacters and arbitrary commands. An attacker with valid Coolify credentials can set specially crafted environment variable keys that break out of the intended Docker command context and execute arbitrary shell commands on the host. The vulnerability requires authentication to Coolify and affects versions before 4.2.0; a patch is available in version 4.2.0 and later.

Affected products

  • Coolify Coolify before 4.2.0

Timeline

  • 2026-09-02: disclosed

References

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