Twig is an open source template language for PHP. When in a sandbox mode, the `arrow` parameter of the `sort` filter must be a closure to avoid attackers being able to run arbitrary PHP functions. In affected versions this constraint was not properly enforced and could lead to code injection of arbitrary PHP code. Patched versions now disallow calling non Closure in the `sort` filter as is the case for some other filters. Users are advised to upgrade.
Created php-twig tracking bugs for this issue:
Affects: epel-all [bug 2051363]
Affects: fedora-all [bug 2051362]
Closing this bug as NOTABUG as any Red Hat product is affected by this vulnerability.