CVE-2025-31489: MinIO performs incomplete signature validation for unsigned-trailer uploads

This is a high priority vulnerability and users must upgrade ASAP.

The signature component of the authorization may be invalid, which would mean that as a client you can use any arbitrary secret to upload objects given the user already has prior WRITE permissions on the bucket,

Prior knowledge of access-key, and bucket name this user might have access to - and an access-key with a WRITE permissions is necessary.

However with relevant information in place, uploading random objects to buckets is trivial and easy via curl