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Vulnerabilities CVE-2026-45042

CVE-2026-45042

High
Open
TLP:CLEAR

RustFS: UploadPartCopy Does Not Enforce Destination Bucket Policy on Copy Source

NVD CVE.org
Critical Infrastructure

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Description

RustFS is a distributed object storage system built in Rust. Prior to 1.0.0-beta.2, improper authorization in the UploadPartCopy operation allows copying objects across buckets without enforcing destination bucket restrictions on allowed copy sources. The implementation validates GetObject permission on the source bucket and PutObject on the destination bucket independently, but does not enforce any policy constraints on whether the destination bucket permits the specified copy source. This enables unauthorized cross-bucket data movement. This vulnerability is fixed in 1.0.0-beta.2.

Details

CVSS Score
7.1
EPSS Score
0.21%

11th percentile

CVSS Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
Confidence
90%
Published
May 28, 2026
Last Modified
May 28, 2026
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