Red Hat: CVE-2025-61919: rubygem-rack: Unbounded read in `Rack::Request` form parsing can lead to memory exhaustion (Multiple Advisories)

A memory-exhaustion vulnerability exists in Rack when parsing application/x-www-form-urlencoded request bodies. Rack::Request#POST reads the entire request body into memory without enforcing a maximum length or cap. Attackers can exploit this by sending large form submissions, potentially causing denial of service (DoS) through memory exhaustion. Even with configured parsing limits, the issue occurs before those limits are enforced, allowing unbounded memory allocation proportional to request size.