CA Civ Proc Code Section 489.220

(a)

Except as provided in subdivision (b), the amount of an undertaking filed pursuant to this article shall be ten thousand dollars ($10,000).

(b)

If, upon objection to the undertaking, the court determines that the probable recovery for wrongful attachment exceeds the amount of the undertaking, it shall order the amount of the undertaking increased to the amount it determines to be the probable recovery for wrongful attachment if it is ultimately determined that the attachment was wrongful.