CVE-2026-45042

HIGH EPSS 10.8%

Published May 28, 20261mo ago · Modified Jun 17, 20261w ago

7.1 CVSS 4.0

High

Published May 28, 2026 1mo ago

Last Modified Jun 17, 2026 1w ago

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.

CVSS Details

Base Score

7.1

Exploitability

—

Impact

—

Vector string

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Attack Vector Network

Attack Complexity Low

Privileges Required Low

User Interaction None

Scope X

Threat Intelligence

EPSS Exploit Probability

10.8% percentile

Exploit & Patch Status

No Known Exploit

No Patch Available

Weaknesses 1

CWE-863 Incorrect Authorization Authorization

References 1

github.com https://github.com/rustfs/rustfs/security/advisories/GHSA-wfxj-ph3v-7mjf

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.