CVE-2026-39360
Published: Apr 7, 2026
Modified: Apr 7, 2026
Description
RustFS is a distributed object storage system built in Rust. Prior to alpha.90, RustFS contains a missing authorization check in the multipart copy path (UploadPartCopy). A low-privileged user who cannot read objects from a victim bucket can still exfiltrate victim objects by copying them into an attacker-controlled multipart upload and completing the upload. This breaks tenant isolation in multi-user / multi-tenant deployments. This vulnerability is fixed in alpha.90.
| Vendor | Product | Versions |
|---|---|---|
rustfs | rustfs | affected < alpha.90 |
Weaknesses (CWE)
References
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