Cracked rim around the spoke
Cracks in the wheel rim do generally need attention. If the cracks are around the nipple and you're a gambling man you can keep an eye on the crack's propagation and maybe use it a little, if they're in the side/wall, it's possible failure will be a little more exciting.
If you purchased them recently you may wish to return or exchange them.
Welding is probably not an option (assuming they're aluminium).