Out of Date Vine Leaves - are they safe to eat?
They may be safe but they are certainly not guaranteed to be safe. see How long can I store a food in the pantry, refrigerator, or freezer.

Besides safety they have likely lost all consistency and won't taste well. You're propensity to prevent food waste is admirable, in this case however, it's best to bin them or better yet, compost them in a flowerpot (if they're not in acid or something).