If you installed/updated via Homebrew-Cask [1], you should not be affected. 2.90 was not always compromised, and looking at Caskroom history, the checksum was only updated for the 2.84 -> 2.90 bump once [2].
It is updated and at 2.92 now, also [3].
(I'm one of the maintainers of Homebrew Cask)
[1] https://github.com/caskroom/homebrew-cask
[2] https://github.com/caskroom/homebrew-cask/issues/19504#issue...