CVE-2025-68926 CRITICAL

CVE-2025-68926: RustFS has a gRPC Hardcoded Token Authentication Bypass

Vendor Rustfs
Product rustfs
Weakness CWE-798 · Hardcoded credentials
Published December 30, 2025
Last update January 5, 2026

CVSS base score

9.8/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality High
Integrity High

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

What the vulnerability does

01Description

RustFS is a distributed object storage system built in Rust. In versions prior to 1.0.0-alpha.78, RustFS implements gRPC authentication using a hardcoded static token `"rustfs rpc"` that is publicly exposed in the source code repository, hardcoded on both client and server sides, non-configurable with no mechanism for token rotation, and universally valid across all RustFS deployments. Any attacker with network access to the gRPC port can authenticate using this publicly known token and execute privileged operations including data destruction, policy manipulation, and cluster configuration changes. Version 1.0.0-alpha.78 contains a fix for the issue.

Key dates

02Disclosure timeline

December 30, 2025 CVE published
January 5, 2026 Record updated