Can I submit a new app version to apple without cancelling a pending release? I have an app Pending Release and would like to update it with a newer version that includes some minor bugs fixes.

Can I do so without removing the App pending release? I don't want to risk that we receive green light to go live and the new app is stuck pending Apple review.

Thanks
No, you'll need to cancel the current pending release, upload the new app, go thru the Review process again, and then you can release it.

This way Apple, and the users, can be sure that developers are not putting malware or viruses in code that's already been reviewed and approved for release.