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@SteveBellovin Same for MacPorts: port sync && port upgrade outdated
@SteveBellovin Note: It may take 30 minutes for the MacPorts rsync server to have the updated PortIndex. Not an issue if you are synchronizing via git.