$fetch:cors-unsafe-request-header-byte-char
[\u0000-\u0008\u000A-\u001F"\u0028-\u0029:<>-\u0040\u005B-\u005D\u007B\u007D\u007F]
[\x00-\x08\x0A-\x1F"\x28-\x29:<>-\x40\x5B-\x5D\x7B\x7D\x7F]
The set definition is contained in sets.json
data file.