Reprinted from TidBITS by permission; reuse governed by Creative Commons license BY-NC-ND 3.0. TidBITS has offered years of thoughtful commentary on Apple and Internet topics. For free email subscriptions and access to the entire TidBITS archive, visit http://www.tidbits.com/ Safari 16.3.1 Adam Engst Apple has released [1]Safari 16.3.1 for macOS 12 Monterey and macOS 11 Big Sur with a patch for a single WebKit vulnerability that Apple says may have been actively exploited in the wild. In other words, install this update immediately! You can download Safari 16.3.1 only via Software Update. (Free, [2]release notes, macOS 11+) References 1. https://www.apple.com/safari/ 2. https://support.apple.com/en-us/HT213638 .