docker/cli · error

plain-text password is not supported

Error message

plain-text password is not supported

What it means

Error "plain-text password is not supported" thrown in docker/cli.

Source

Thrown at cli/connhelper/ssh/ssh.go:54

}

func newSpec(u *url.URL) (*Spec, error) {
	if u == nil {
		return nil, errors.New("URL is nil")
	}
	if u.Scheme == "" {
		return nil, errors.New("no scheme provided")
	}
	if u.Scheme != "ssh" {
		return nil, errors.New("incorrect scheme: " + u.Scheme)
	}

	var sp Spec

	if u.User != nil {
		sp.User = u.User.Username()
		if _, ok := u.User.Password(); ok {
			return nil, errors.New("plain-text password is not supported")
		}
	}
	sp.Host = u.Hostname()
	if sp.Host == "" {
		return nil, errors.New("hostname is empty")
	}
	sp.Port = u.Port()
	sp.Path = u.Path
	if u.RawQuery != "" {
		return nil, fmt.Errorf("query parameters are not allowed: %q", u.RawQuery)
	}
	if u.Fragment != "" {
		return nil, fmt.Errorf("fragments are not allowed: %q", u.Fragment)
	}

	return &sp, nil
}

View on GitHub (pinned to e9452d6e78)

When it happens

Trigger: Thrown at cli/connhelper/ssh/ssh.go:54 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of docker/cli@e9452d6e78 (2026-08-01). Data as JSON: /data/errors/05713c88df7a09cd.json. Report an issue: GitHub.