It is the IV shared in CBC mode?
Yes, the IV is the same in both encryption and decryption for all modes that use an IV.  And yes, the decrypter must have access to the IV to decrypt the ciphertext.  The IV is not a secret.

The only caveat is that for CBC mode the IV must be unpredictable to an attacker whose data is being encrypted by another party.  Once the attacker has presented the data to be encrypted that IV need no longer be secret.