---
cve: "CVE-2026-109119"
severity: "HIGH"
cvss: 8.8
epss: ""
vendor: "ikus-soft"
kev: false
exploited: false
published: "2026-10-16 11:17:00"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-10-23T09:01:20+02:00"
---

# CVE-2026-109119

> 8.8 HIGH

## Beschreibung

Improper Privilege Management in the user management API endpoint (/api/users/{username_or_id}) in Rdiffweb allows authenticated users to elevate their privileges to administrator by modifying the role parameter in a POST request.

## CNA-Record (Kanon, cvelistV5)

- CNA: **GitLab**
- State: PUBLISHED
- Stand: 2026-10-16 13:31:33
- CNA-CVSS: **8.8** (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`)

## CISA-Anreicherung (vulnrichment/ADP)

- CISA-SSVC (Coordinator, v2.0.3):
  - Exploitation: **none**
  - Automatable: **no**
  - Technical Impact: **total**

## CVSS-Vektor

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

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Gering | warn |
| UI Interaktion | Keine | bad |
| S Scope | Unverändert | good |
| C Vertraulichkeit | Hoch | bad |
| I Integrität | Hoch | bad |
| A Verfügbarkeit | Hoch | bad |

## Schwachstellen-Klasse

- **CWE-862** — Missing Authorization
  The product does not perform an authorization check when an actor attempts to access a resource or perform an action.

## Angriffsmuster (CAPEC)

- [CAPEC-665 — Exploitation of Thunderbolt Protection Flaws](https://capec.mitre.org/data/definitions/665.html) _(Severity: Very High)_

## ATT&CK-Techniken

- [T1211 — Exploitation for Defensive Evasion](https://attack.mitre.org/techniques/T1211/)
- [T1542.002 — Pre-OS Boot: Component Firmware](https://attack.mitre.org/techniques/T1542/002/)
- [T1556 — Modify Authentication Process](https://attack.mitre.org/techniques/T1556/)

## Patch verfügbar (OSV)

- b529adf2c13a210d10aaf56325de4d3fb2428abe (Commit)
- 4ce35fc2d23ac1cc789186f32bf76603b2eddeb3 (Commit)

## Referenzen

- <https://gitlab.com/ikus-soft/rdiffweb>
- <https://gitlab.com/ikus-soft/rdiffweb/-/commit/b529adf2c13a210d10aaf56325de4d3fb2428abe>
- <https://gitlab.com/ikus-soft/rdiffweb/-/commit/4ce35fc2d23ac1cc789186f32bf76603b2eddeb3>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/sicherheitsluecken/cve-2026-109119/) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI WID (CSAF)_