In Laravel Framework through 5.5.40 and 5.6.x through 5.6.29, remote code execution might occur as a result of an unserialize call on a potentially untrusted X-XSRF-TOKEN value. This involves the decrypt method in Illuminate/Encryption/Encrypter.php and PendingBroadcast in gadgetchains/Laravel/RCE/3/chain.php in phpggc. The attacker must know the application key, which normally would never occur, but could happen if the attacker previously had privileged access or successfully accomplished a previous attack.
https://isc.sans.edu/diary/rss/31086
https://thehackernews.com/2024/03/androxgh0st-malware-targets-laravel.html
https://blogs.juniper.net/en-us/security/shielding-networks-against-androxgh0st
https://www.cisa.gov/news-events/cybersecurity-advisories/aa24-016a