Some sources are saying that canned pumpkin can be safe to eat up to 10 years past the expiration date, although it might not taste as good.

According to the USDA, if your canned food is stored in a cool, dry place and is in good condition, then the contents inside should be perfectly fine to eat. This means that there are no dents, swelling or rust on the can. So if your unopened can of pumpkin puree looks spotless, it should be safe to eat regardless of its expiration date. Keep in mind: this doesn't mean that the taste, texture or nutrition will be the same as a non-expired can, as these are qualities that decline over time. If your pumpkin puree smells or looks off, it's best to trust your gut and throw it away. Bacteria may have entered the can through unnoticed abrasions, causing the contents inside to spoil.