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

- Exploited (CISA KEV): no
- Published: 2025-12-30
- CVSS: 9.8 CRITICAL (v3.1)
- EPSS: 31.9% (98th percentile)
- CWE: CWE-798, CWE-287

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.

## Edge WAF coverage (claimed by vendors, not measured)

| Vendor | Status | First rule | Days after publication |
|---|---|---|---|
| Cloudflare | No public claim | — | — |
| AWS | No public claim | — | — |
| Microsoft Azure | No public claim | — | — |
| Google Cloud | No public claim | — | — |
| Fastly | Before feed history | — | — |
| F5 | Rule published | 2026-01-20 | 21 |
| Akamai | No public source | — | — |
| OWASP CRS | No public claim | — | — |

### F5

- 2026-01-20 · new · rule 200013167
  > Added: signature 200013167 "RustFS Hardcoded Authentication Token" (Authentication/Authorization Attacks, risk High), systems: Other Web Server. References: CVE-2025-68926.
  Source: https://docs.cloud.f5.com/docs-v2/platform/changelogs/security-details-changelog

"No public claim" means no vendor statement names this CVE; "Before feed history" means the CVE is older than the vendor feed. In both cases generic rules may still block it.

HTML: https://cve.vigilbase.com/cve/CVE-2025-68926 · JSON: https://cve.vigilbase.com/api/v1/cves/CVE-2025-68926