CVE-2026-27607

RustFS is a distributed object storage system built in Rust. In versions 1.0.0-alpha.56 through 1.0.0-alpha.82, RustFS does not validate policy conditions in presigned POST uploads PostObject, allowing attackers to bypass content-length-range, starts-with, and Content-Type constraints. This enabl...

RustFS: Missing Post Policy Validation leads to Arbitrary Object Write

Summary RustFS does not validate policy conditions in presigned POST uploads PostObject, allowing attackers to bypass content-length-range, starts-with, and Content-Type constraints. This enables unauthorized file uploads exceeding size limits, uploads to arbitrary object keys, and content-type...