A Blue Yonder ransomware attack has resulted in an outage affecting US and UK grocery chains and other major companies.

A ransomware attack on Blue Yonder over the weekend is affecting Starbucks' ability to track employee hours on Monday.

As per a CNN report, Starbucks is one of the companies feeling the effects of the ransomware attack. Allegedly, the coffee chain uses Blue Yonder to track and manage its baristas’ schedules. Furthermore, two of the four biggest grocery chains in the UK - Morrisons, and Sainsbury, also confirmed being affected by the attack.