---
cve: "CVE-2026-21862"
severity: "HIGH"
cvss: 7.7
epss: "21%"
vendor: "rustfs"
kev: false
exploited: false
published: "2026-02-03 16:16:12"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-17T22:17:04+02:00"
---

# CVE-2026-21862

> 7.7 HIGH · 🧪 PoC

## Beschreibung

RustFS is a distributed object storage system built in Rust. Prior to version alpha.78, IP-based access control can be bypassed: get_condition_values trusts client-supplied X-Forwarded-For/X-Real-Ip without verifying a trusted proxy, so any reachable client can spoof aws:SourceIp and satisfy IP-allowlist policies. This issue has been patched in version alpha.78.

## CVSS-Vektor

```
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:P
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |

## Referenzen

- <https://github.com/rustfs/rustfs/security/advisories/GHSA-fc6g-2gcp-2qrq>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-21862) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_