---
cve: "CVE-2026-49103"
severity: "CRITICAL"
cvss: 9.4
epss: "0.5%"
vendor: "Webmin"
kev: false
exploited: false
published: "2026-05-27 15:16:34"
tags: [cve, security, critical]
source: tsecurity.de CVE-Dossier
exported: "2026-10-02T19:52:37+02:00"
---

# CVE-2026-49103

> 9.4 CRITICAL · 🧪 PoC

## Beschreibung

Webmin before 2.640 does not safely construct a filename for saving of an attachment within the mailboxes component. This occurs in mailboxes/detachall.cgi.

## CISA-Anreicherung (vulnrichment/ADP)

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

## CVSS-Vektor

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

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

## Patch verfügbar (OSV)

- c0c0cc323cda48ee5903502ca2e3dbbec6a9aee9 (Commit)
- cf432879a14568c4bb44cd2f9e5a9bd0e168edc1 (Commit)

## BSI-Hinweise (deutsch)

- [Webmin: Mehrere Schwachstellen](https://wid.cert-bund.de/portal/wid/sicherheitshinweis/WID-SEC-W-2026-1709)

## Referenzen

- <https://github.com/webmin/webmin/commit/cf432879a14568c4bb44cd2f9e5a9bd0e168edc1>
- <https://github.com/webmin/webmin/compare/2.630...2.640>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-49103) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI WID (CSAF)_