---
id: CVE-2026-100382
title: >-
  Improper Neutralization of Special Elements used in an OS Command ('OS Command
  Injection') vulnerability in Wikimedia Foundation Mediawiki - ExternalData
  Extension allows OS Command Injection.


  This issue affects Mediawiki - ExternalData…
summary: >-
  Improper Neutralization of Special Elements used in an OS Command ('OS Command
  Injection') vulnerability in Wikimedia Foundation Mediawiki - ExternalData
  Extension allows OS Command Injection.


  This issue affects Mediawiki - ExternalData…
severity: critical
cvss: 10
cvssVector: 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H'
cwe:
  - CWE-78
vendor: Wikimedia Foundation
product: Mediawiki - ExternalData Extension
affected:
  - mediawiki_-_externaldata_extension < 3.7
published: '2026-09-25'
updated: '2026-09-28'
sourceUpdated: '2026-09-28T16:38:10.183'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-100382'
references:
  - url: >-
      https://gerrit.wikimedia.org/r/c/mediawiki/extensions/ExternalData/+/1326012
    label: c4f26cc8-17ff-4c99-b5e2-38fc1793eacc
  - url: 'https://phabricator.wikimedia.org/T434961'
    label: c4f26cc8-17ff-4c99-b5e2-38fc1793eacc
tags:
  - nvd
  - exploit-available
  - cve.org
exploits:
  github: 1
  githubRepos:
    - 'https://github.com/nth347/mediawiki-CVE-2026-100382'
  checkedAt: '2026-10-27T16:52:10.943Z'
exploitAvailable: true
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: total
  timestamp: '2026-09-26T22:43:20.551535Z'
cvssSource: cna
ingestedAt: '2026-09-25T21:19:40.217Z'
epss: 0.01214
epssPercentile: 0.68387
---

## Overview

Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') vulnerability in Wikimedia Foundation Mediawiki - ExternalData Extension allows OS Command Injection.

This issue affects Mediawiki - ExternalData Extension: from * before 3.7.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.