S3 bucket has incomplete multipart uploads consuming storage

Severity: Medium
Service: S3
Check ID: S3_INCOMPLETE_MULTIPART

What this check finds

Incomplete multipart uploads accumulate storage charges (at the bucket's storage class rate) indefinitely until explicitly aborted. They are never visible as objects but do appear on the bill. Common causes are interrupted uploads or application bugs that initiate but never complete multipart uploads.

Passing looks like: No incomplete S3 multipart uploads.

How to fix it

Abort incomplete multipart uploads.

AWS CLI

aws s3api list-multipart-uploads --bucket BUCKET_NAME

Then abort each one:

aws s3api abort-multipart-upload --bucket BUCKET_NAME --key KEY --upload-id UPLOAD_ID

Prevent recurrence by adding a bucket lifecycle rule with AbortIncompleteMultipartUpload and DaysAfterInitiation: 7.

Names in capitals are placeholders for your own resource. Review a command before you run it.

AWS console

S3 → bucket → Management → Lifecycle rules → Create rule.

Compliance

This is a cost check. It flags spend that buys nothing, which no compliance framework asks about, so it is not mapped to a control.

Checked on every scan

KloudLytics runs this check each time it scans a connected AWS account, through a read-only role, and lists every affected resource with its region. On Pro and Business a fix is written for the specific resource rather than the general case above. The exact access it needs

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