Data chunks inside another file are effectively quarantined by default. There is no exempting or security issue, it's safe by design. It will get scanned occasionally but not on every write.
Word Docs with embedded content or can trigger code execution on parsing, data structures that break AV parsers, image or font data that causes system libraries to overflow/UAF/etc; There all could potentially be a security issue in a DB, the same as in a FS.