The net/http package accepted data in the chunked transfer encoding containing an invalid chunk-size line terminated by a bare LF. When used in conjunction with a server or proxy which incorrectly interprets a bare LF in a chunk extension as part of the extension, this could permit request smuggling. The net/http package now rejects chunk-size lines containing a bare LF. Thanks to Jeppe Bonde Weikop for reporting this issue. This is CVE-2025-22871 and Go issue https://go.dev/issue/71988.
