[HIGH] Session data truncation can lead to unserialization of user provided data

PKSA-4jbn-vr6y-x6k7 CVE-2016-3171 GHSA-69g8-g9jq-74v7

Affected package: drupal/core

Affected version: >=8.0,<8.0.4

Reported by:
FriendsOfPHP/security-advisories, GitHub