Misconfigured lifecycle policies may unintentionally allow data to be exfiltrated or destroyed prematurely, resulting in a loss of availability and potential exposure of sensitive data.
Pre-signed URLs generated with excessive permissions, overly long expiry durations, or insufficient scope constraints may be leaked or shared beyond their intended audience. Because the URL itself acts as a bearer credential, any entity in possession of the URL can access the referenced resource without further authentication, bypassing standard access controls.
Storage Class Downgrade Leading to Durability or Availability Loss
An authorized entity or misconfigured lifecycle policy may transition objects from a high-durability or high-availability storage class to a lower-durability or single-zone class. This degradation manifests only when a subsequent failure occurs (e.g., availability zone outage). Objects may also be transitioned to archival tiers, rendering them effectively inaccessible for extended retrieval periods during incidents.