CVE-2023-45290

When parsing a multipart form (either explicitly with
Request.ParseMultipartForm or implicitly with Request.FormValue,
Request.PostFormValue, or Request.FormFile), limits on the total size of
the parsed form were not applied to the memory consumed while reading a
single form line. This permits a maliciously crafted input containing very
long lines to cause allocation of arbitrarily large amounts of memory,
potentially leading to memory exhaustion. With fix, the ParseMultipartForm
function now correctly limits the maximum size of form lines.

Notes