CVE-2026-84694
Received Received - Intake

Remote Code Execution in Coolify via SSH Environment Injection

Publication date: 2026-09-02

Last updated on: 2026-09-02

Assigner: VulnCheck

Description
Coolify before 4.2.0 fails to properly escape environment variable key names in Docker commands executed over SSH on managed servers. Authenticated attackers can inject shell metacharacters into environment variable keys to execute arbitrary commands on the server host outside containers.

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Meta Information

Published
2026-09-02
Last Modified
2026-09-02
Generated
2026-09-02
AI Q&A
2026-09-02
EPSS Evaluated
N/A
NVD
CVE-2026-84694
EUVD
EUVD-2026-69785

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
coollabsio coolify to 4.2.0 (exc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-78 The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.

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Executive Summary

CVE-2026-84694 is a high-severity Remote Code Execution (RCE) vulnerability affecting Coolify versions before 4.2.0. It occurs because the software fails to properly escape environment variable key names in Docker commands executed over SSH. Authenticated attackers can inject shell metacharacters into these keys to run arbitrary commands on the host server outside containers.

Detection Guidance

To detect this vulnerability, check if your Coolify instance is running a version before 4.2.0. Inspect environment variable handling in Docker commands executed over SSH. Look for improperly escaped keys in logs or configuration files. No specific commands are provided in the context.

Impact Analysis

An attacker with access could execute malicious commands on your server, potentially stealing data, installing malware, or disrupting services. Since Coolify manages deployments via SSH, this could compromise the entire host system, not just containers.

Compliance Impact

This vulnerability could lead to unauthorized access or data breaches, violating GDPR (data protection) and HIPAA (health data privacy). Organizations using affected Coolify versions may face compliance violations, fines, or legal consequences if exploited.

Mitigation Strategies

Upgrade Coolify to version 4.2.0 or later immediately. Review and restrict SSH access to trusted users. Audit environment variable configurations for suspicious keys. Monitor for unauthorized command execution on managed servers.

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