CVE-2026-39360— RustFS has an authorization bypass in multipart UploadPartCopy enables cross-bucket object exfiltration
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I. Basic Information for CVE-2026-39360
Vulnerability Information
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Vulnerability Title
RustFS has an authorization bypass in multipart UploadPartCopy enables cross-bucket object exfiltration
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
授权机制缺失
Source: NVD (National Vulnerability Database)
Vulnerability Title
rustfs 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
rustfs是RustFS开源的一个高性能对象存储系统。 RustFS alpha.90之前版本存在安全漏洞，该漏洞源于多部分复制路径中缺少授权检查，可能导致低权限用户突破租户隔离。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2026-39360
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V. Comments for CVE-2026-39360
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