---
cve: "CVE-2026-22042"
severity: "MEDIUM"
cvss: 5.7
epss: "41%"
vendor: "rustfs"
kev: false
exploited: false
published: "2026-01-08 15:15:45"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-17T05:39:00+02:00"
---

# CVE-2026-22042

> 5.7 MEDIUM · 🧪 PoC

## Beschreibung

RustFS is a distributed object storage system built in Rust. Prior to version 1.0.0-alpha.79, he `ImportIam` admin API validates permissions using `ExportIAMAction` instead of `ImportIAMAction`, allowing a principal with export-only IAM permissions to perform import operations. Since importing IAM data performs privileged write actions (creating/updating users, groups, policies, and service accounts), this can lead to unauthorized IAM modification and privilege escalation. Version 1.0.0-alpha.79 fixes the issue.

## CVSS-Vektor

```
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/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 | Gering | warn |
| UI Interaktion | Keine | bad |

## Patch verfügbar (OSV)

- a95e549430851f3c34ee4cc8dd7be60aa200e8c4 (Commit)

## Referenzen

- <https://github.com/rustfs/rustfs/security/advisories/GHSA-vcwh-pff9-64cc>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-22042) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_