CVE-2026-6406

Docker · Docker Desktop

The Docker CLI --use-api-socket flag allows for the bypass of Enhanced Container Isolation (ECI) restrictions in Docker Desktop.

Executive summary

The Docker CLI contains a security flaw that permits the bypass of critical container isolation protections in Docker Desktop, increasing the risk of container escape.

Vulnerability

This vulnerability involves an improper restriction of operations when using the --use-api-socket flag within the Docker CLI. This bypasses Enhanced Container Isolation (ECI) protections, potentially allowing a user to break out of expected container security boundaries.

Business impact

Bypassing ECI restrictions undermines the security of containerized environments, potentially allowing malicious actors to gain unauthorized access to the host system or interact with other containers. With a CVSS score of 8.8, this flaw represents a significant risk to the security posture of any organization utilizing Docker Desktop for development or testing.

Remediation

Immediate Action: Update Docker Desktop to the latest version and ensure that all CLI tools are patched to incorporate the necessary security restrictions.

Proactive Monitoring: Audit container configuration files and monitor for unauthorized usage of the --use-api-socket flag in deployment scripts.

Compensating Controls: Restrict access to the Docker socket and enforce strict user permissions for individuals with access to the Docker CLI.

Exploitation status

Public Exploit Available: false

Analyst recommendation

Container isolation is a fundamental security control; therefore, this vulnerability must be addressed with high urgency. Organizations should audit their Docker configurations and apply the vendor-provided updates immediately to restore the integrity of their container environment.