CVE-2025-68926

RustFS has a gRPC Hardcoded Token Authentication Bypass

State: Published
Severity: 9.8 Critical
Published: Dec 30, 2025
Updated: Jan 5, 2026
Reserved: Dec 24, 2025

Description

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.

Scores

CVSS	Score	Vector	Source
3.1	9.8 Critical	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	GitHub_M

Weaknesses

CWE-798 Use of Hard-coded Credentials
CWE-287 Improper Authentication

Affected Products

Product	Versions
rustfsrustfs	< 1.0.0-alpha.78Affected

References

https://github.com/rustfs/rustfs/security/advisories/GHSA-h956-rh7x-ppgj

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