Security Advisory

CVE-2026-55838

CVE vulnerability detail - eXtreme Datacenter Security Operations

Published 2026-06-26 19:57:46

Last updated 2026-06-27 03:07:19

Assigner GitHub_M

CVSS score 4.3

State PUBLISHED

Description

RustFS is a distributed object storage system built in Rust. In 1.0.0-beta.7 and earlier, the real-time metrics endpoint at /rustfs/admin/v3/metrics is accessible to any valid IAM user regardless of their assigned policy. Every other admin handler in the codebase calls validate_admin_request to enforce admin-action IAM checks; the MetricsHandler skips this call entirely. A restricted IAM user whose policy grants only access to their own bucket can read server-wide operational metrics including disk I/O statistics, network throughput, scanner cycle timing, and cluster RPC state.

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