---
title: "CVE-2025-68926: RustFS has a gRPC Hardcoded Token Authentication Bypass"
url: https://erroneo.us/security/cve/CVE-2025-68926/
description: "CVE-2025-68926 (rustfs (crates.io (Rust))): RustFS is a distributed object storage system built in Rust. In versions prior to 1.0.0-alpha.78, RustFS…"
type: vulnerability-record
section: "Security Digest"
date_published: 2025-12-30
date_modified: 2026-01-07
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2025-68926"
kev: false
cvss: 9.8
epss: 0.3185
license: All rights reserved. Quote with attribution and a link.
---

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

**Signal:** High exploit likelihood. EPSS ranks it in the top 5% of all CVEs for likely exploitation in the next 30 days. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- Not in CISA KEV , but CISA’s SSVC assessment records a public proof-of-concept, so attack code exists.
- EPSS 31.9% , percentile 98: FIRST’s model estimates a 31.9% chance of exploitation activity in the next 30 days, higher than 98% of all scored CVEs (very high). EPSS is a probability, not a verdict.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
- Only applies if your dependency tree includes rustfs (crates.io (Rust)) >= 1.0.0-alpha.13, <= 1.0.0-alpha.77, fixed in 1.0.0-alpha.78 . Check your lockfile, including transitive dependencies.

## What it is

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.

## Affected packages

- crates.io (Rust) `rustfs` >= 1.0.0-alpha.13, <= 1.0.0-alpha.77 → fixed: 1.0.0-alpha.78

## Affected products (CVE record)

- rustfs rustfs: < 1.0.0-alpha.78

## Severity

- GitHub_M CVSS 3.1: 9.8 `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`
- GitHub CVSS 3.1: 9.8 `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`

## Exploitation

- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation poc , automatable yes , technical impact total .
- FIRST EPSS (model of 2026-10-21): 31.85% probability of exploitation activity in the next 30 days; percentile 98.

## Sources

- [GitHub Advisory GHSA-h956-rh7x-ppgj](https://github.com/advisories/GHSA-h956-rh7x-ppgj)
- [CVE.org record CVE-2025-68926](https://www.cve.org/CVERecord?id=CVE-2025-68926)
- [NVD entry CVE-2025-68926](https://nvd.nist.gov/vuln/detail/CVE-2025-68926)
- [github.com](https://github.com/rustfs/rustfs/security/advisories/GHSA-h956-rh7x-ppgj)
- [github.com](https://github.com/rustfs/rustfs/releases/tag/1.0.0-alpha.78)

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Source page: https://erroneo.us/security/cve/CVE-2025-68926/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt