CVE-2023-26044

react/http is an event-driven, streaming HTTP client and server
implementation for ReactPHP. Previous versions of ReactPHP’s HTTP server
component contain a potential DoS vulnerability that can cause high CPU
load when processing large HTTP request bodies. This vulnerability has
little to no impact on the default configuration, but can be exploited when
explicitly using the RequestBodyBufferMiddleware with very large settings.
This might lead to consuming large amounts of CPU time for processing
requests and significantly delay or slow down the processing of legitimate
user requests. This issue has been addressed in release 1.9.0. Users are
advised to upgrade. Users unable to upgrade may keep the request body
limited using RequestBodyBufferMiddleware with a sensible value which
should mitigate the issue. An infrastructure or DevOps workaround could be
to place a reverse proxy in front of the ReactPHP HTTP server to filter out
any excessive HTTP request bodies.