If you use Homebrew on MacOS, you're affected—do 'brew update' and 'brew upgrade’.
https://infosec.exchange/@wdormann/112179988525798247
Will Dormann (@[email protected])

Just a backdoor in XZ. Nothing important. https://www.openwall.com/lists/oss-security/2024/03/29/4

Infosec Exchange
@SteveBellovin I've wondered this for a long time, always assumed it was a dumb question, but I might as well ask it anyway: why do or should we trust Homebrew in the first place?