CVE-2026-6406 (High) detected in github.com/docker/cli-v29.4.0+incompatible

[mend-bolt-for-github]

CVE-2026-6406 - High Severity Vulnerability

Vulnerable Library - github.com/docker/cli-v29.4.0+incompatible

The Docker CLI

Library home page: https://proxy.golang.org/github.com/docker/cli/@⁠v/v29.4.0+incompatible.zip

Path to dependency file: /engine/go.mod

Path to vulnerable library: /home/wss-scanner/go/pkg/mod/cache/download/github.com/docker/cli/@⁠v/v29.4.0+incompatible.mod

Dependency Hierarchy:

• ❌ github.com/docker/cli-v29.4.0+incompatible (Vulnerable Library)

Found in base branch: master

Vulnerability Details

The Docker CLI --use-api-socket flag bypasses Enhanced Container Isolation (ECI) restrictions in Docker Desktop. When ECI is enabled, Docker socket mounts from containers are denied unless explicitly allowed via the admin-settings configuration. However, the --use-api-socket flag adds the Docker socket mount via the HostConfig.Mounts field rather than the HostConfig.Binds field. The ECI enforcement in the Docker Desktop API proxy only inspected Binds, allowing the mount to pass unchecked. This grants a container full access to the Docker Engine socket and, if the host user has logged in to container registries, their authentication credentials.
A local attacker with the ability to run Docker CLI commands can exploit this to escape ECI restrictions, access the Docker Engine, and potentially escalate privileges.

Publish Date: 2026-05-22

URL: CVE-2026-6406

CVSS 3 Score Details (8.8)

Base Score Metrics:

• Exploitability Metrics:
  • Attack Vector: Local
  • Attack Complexity: Low
  • Privileges Required: Low
  • User Interaction: None
  • Scope: Changed
• Impact Metrics:
  • Confidentiality Impact: High
  • Integrity Impact: High
  • Availability Impact: High

For more information on CVSS3 Scores, click here.

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