Here we go again. Fresh side-channel exploits are being reported which affects ALL Intel based computers, even those MAC's running Intel chips. Please read both articles as they are related to your situation.
Edited: Patch info can be found here. https://techcrunch.com/2019/05/14/intel-chip-flaws-patches-released/
https://www.zdnet.com/article/intel-cpus-impacted-by-new-zombieload-side-channel-attack/
https://9to5mac.com/2019/05/14/intel-zombieload-vulnerability-mac/
**The MAC patch is included in macOS 10.14.5