CVE-2025-61770 Rack's unbounded multipart preamble buffering enables DoS (memory exhaustion)

Rack is a modular Ruby web server interface. In versions prior to 2.2.19, 3.1.17, and 3.2.2, Rack::Multipart::Parser buffers the entire multipart preamble bytes before the first boundary in memory without any size limit. A client can send a large preamble followed by a valid boundary, causing...

PT-2025-41012

Name of the Vulnerable Software and Affected Versions Rack versions prior to 2.2.19 Rack versions prior to 3.1.17 Rack versions prior to 3.2.2 Description Rack is a modular Ruby web server interface. The Rack::Multipart::Parser component does not limit the size of the multipart preamble,...