CVE-2024-39316

Rack is a modular Ruby web server interface. Starting in version 3.1.0 and
prior to version 3.1.5, Regular Expression Denial of Service (ReDoS)
vulnerability exists in the Rack::Request::Helpers module when parsing
HTTP Accept headers. This vulnerability can be exploited by an attacker
sending specially crafted Accept-Encoding or Accept-Language headers,
causing the server to spend excessive time processing the request and
leading to a Denial of Service (DoS). The fix for CVE-2024-26146 was not
applied to the main branch and thus while the issue was fixed for the Rack
v3.0 release series, it was not fixed in the v3.1 release series until
v3.1.5. Users of versions on the 3.1 branch should upgrade to version 3.1.5
to receive the fix.