Twig is a template language for PHP. Under some circumstances, the sandbox security checks are not run which allows user-contributed templates to bypass the sandbox restrictions. This vulnerability is fixed in 1.44.8, 2.16.1, and 3.14.0.
https://github.com/twigphp/Twig/security/advisories/GHSA-6j75-5wfj-gh66
https://github.com/twigphp/Twig/commit/7afa198603de49d147e90d18062e7b9addcf5233
https://github.com/twigphp/Twig/commit/2102dd135986db79192d26fb5f5817a566e0a7de
https://github.com/twigphp/Twig/commit/11f68e2aeb526bfaf638e30d4420d8a710f3f7c6