Inappropriate setting of the SEE_MASK_FLAG_NO_UI flag in file downloads in Google Chrome prior to 66.0.3359.117 allowed a remote attacker to potentially bypass OS malware checks via a crafted HTML page.
https://security.gentoo.org/glsa/201804-22
https://chromereleases.googleblog.com/2018/04/stable-channel-update-for-desktop.html