Failure to disallow PWA installation from CSP sandboxed pages in AppManifest in Google Chrome prior to 65.0.3325.146 allowed a remote attacker to access privileged APIs via a crafted HTML page.
https://www.debian.org/security/2018/dsa-4182
https://chromereleases.googleblog.com/2018/03/stable-channel-update-for-desktop.html