---
cve: "CVE-2026-56731"
severity: "HIGH"
cvss: 8.4
epss: "0.2%"
vendor: "Zammad"
kev: false
exploited: false
published: "2026-09-25 18:17:27"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-28T09:42:22+02:00"
---

# CVE-2026-56731

> 8.4 HIGH · 🧪 PoC

## Beschreibung

Zammad is a web based open source helpdesk/customer support system. Prior to 7.0.1, a low-privilege authenticated user may inject arbitrary HTML markup, including JavaScript event handlers, into a ticket title via the standard ticket creation workflow. The title is persisted without sanitization. This issue is fixed in version 7.0.1.

## 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:A/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N
```

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

## Patch verfügbar (OSV)

- 16a4a2e1be6642ec0c3ba3a76e358ad065f48f78 (Commit)

## Referenzen

- <https://github.com/zammad/zammad/security/advisories/GHSA-p9xp-gx8r-4397>
- <https://github.com/zammad/zammad/commit/16a4a2e1be6642ec0c3ba3a76e358ad065f48f78>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-56731) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI WID (CSAF)_