---
cve: "CVE-2026-100376"
severity: "MEDIUM"
cvss: 4.8
epss: "0.3%"
vendor: "Wikimedia Foundation"
kev: false
exploited: false
published: "2026-09-25 21:17:21"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-28T10:30:24+02:00"
---

# CVE-2026-100376

> 4.8 MEDIUM

## Beschreibung

Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation Mediawiki - TemplateSandbox Extension allows Cross-Site Scripting (XSS).

This issue affects Mediawiki - TemplateSandbox Extension: from * before 1.46.1, 1.45.5, 1.43.10.

## CNA-Record (Kanon, cvelistV5)

- CNA: **wikimedia-foundation**
- State: PUBLISHED
- Stand: 2026-09-26 22:51:18
- CNA-CVSS: **4.8** (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L`)

## CISA-Anreicherung (vulnrichment/ADP)

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

## CVSS-Vektor

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

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

## Referenzen

- <https://phabricator.wikimedia.org/T430596>
- <https://gerrit.wikimedia.org/r/q/I6630b9915f640bf75c8570165eb8728bd7a2c07a>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-100376) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI WID (CSAF)_