Does an issued X509 certificate have a thumbprint (hash) included as one of the items in
the X509 certificate?


No, an X.509 certificate does not include it's own fingerprint. The X.509 fingerprint values used are a hash of the entire certificate. For the obvious reason, you can't include the result of a hash operation into the source of the hashed data without invalidating the hash.

Other fingerprints may be included in the certificate; see What is the actual value of a certificate fingerprint for a good answer on this topic.

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