---
cve: "CVE-2026-100383"
severity: "MEDIUM"
cvss: 4.8
epss: "0.3%"
vendor: "Wikimedia Foundation"
kev: false
exploited: false
published: "2026-09-25 22:17:10"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-30T16:02:03+02:00"
---

# CVE-2026-100383

> 4.8 MEDIUM

## Beschreibung

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

This issue affects Mediawiki - WikiLambda Extension: 1.47.0-alpha. The issue has been remediated on the `master` branch.

## CNA-Record (Kanon, cvelistV5)

- CNA: **wikimedia-foundation**
- State: PUBLISHED
- Stand: 2026-09-26 22:51:17
- CNA-CVSS: **4.8** (`CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N`)

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

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

## Referenzen

- <https://phabricator.wikimedia.org/T434967>
- <https://gerrit.wikimedia.org/r/c/mediawiki/extensions/WikiLambda/+/1326391>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-100383) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI WID (CSAF)_