CVE-2026-100382

Received Received - Intake

OS Command Injection in MediaWiki ExternalData Extension

Publication date: 2026-09-25

Last updated on: 2026-09-25

Assigner: wikimedia-foundation

Description

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.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-09-25

Last Modified

2026-09-25

Generated

2026-09-26

AI Q&A

2026-09-26

EPSS Evaluated

N/A

NVD

CVE-2026-100382

Affected Vendors & Products

Vendor	Product	Version / Range
wikimedia	mediawiki_externaldata_extension	From *\|end_excluding=3.7 (inc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-78	The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.

Attack-Flow Graph

Executive Summary

This is an OS Command Injection vulnerability in the Wikimedia Foundation MediaWiki ExternalData Extension. It allows attackers to execute arbitrary OS commands by injecting special elements into the application. The flaw exists in versions before 3.7 of the extension.

Impact Analysis

An attacker could exploit this to run unauthorized commands on the server hosting the MediaWiki instance. This may lead to full system compromise, data theft, or disruption of services. The high CVSS score indicates severe potential impact.

Compliance Impact

This vulnerability could lead to unauthorized access or data breaches, violating GDPR (data protection) and HIPAA (health data privacy). Non-compliance may result in legal penalties, fines, and reputational damage for affected organizations.

Mitigation Strategies

Update Mediawiki - ExternalData Extension to version 3.7 or later to address the OS Command Injection vulnerability.

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