GHSA-V3PH-CGQH-R8P5 FrankenPHP: Cross-request PHP session ID leak in worker mode when the session extension is a shared module

Summary In worker mode under concurrency, FrankenPHP can hand a PHP session id from one request to another when PHP's session extension is loaded as a shared module instead of being statically linked into the FrankenPHP binary. A request presenting Cookie: session=A can have sessionid resolve to ...