Security Advisory

CVE-2026-27607

CVE vulnerability detail — eXtreme Datacenter Security Operations

Published 2026-02-25 02:10:28

Last updated 2026-02-25 20:06:03

Assigner GitHub_M

State PUBLISHED

Description

RustFS is a distributed object storage system built in Rust. In versions 1.0.0-alpha.56 through 1.0.0-alpha.82, RustFS does not validate policy conditions in presigned POST uploads (PostObject), allowing attackers to bypass content-length-range, starts-with, and Content-Type constraints. This enables unauthorized file uploads exceeding size limits, uploads to arbitrary object keys, and content-type spoofing, potentially leading to storage exhaustion, unauthorized data access, and security bypasses. Version 1.0.0-alpha.83 fixes the issue.

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