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.

INFO

Published Date :

2026-04-07T18:58:29.974Z

Last Modified :

2026-04-07T19:28:22.541Z

Source :

GitHub_M
AFFECTED PRODUCTS

The following products are affected by CVE-2026-39360 vulnerability.

Vendors Products
Rustfs
  • Rustfs
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-39360.

URL Resource
https://github.com/rustfs/rustfs/security/advisories/GHSA-mx42-j6wv-px98 cve-icon cve-icon
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CVSS Vulnerability Scoring System

Detailed values of each vector for above chart.
Attack Vector
Attack Complexity
Attack Requirements
Privileges Required
User Interaction
VS Confidentiality
VS Integrity
VS Availability
SS Confidentiality
SS Integrity
SS Availability
Detailed values of each vector for above chart.
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact