CVE-2026-100242
Received Received - Intake

Uncontrolled Resource Consumption in MediaWiki DataTransfer Extension

Publication date: 2026-09-29

Last updated on: 2026-09-29

Assigner: wikimedia-foundation

Description
Dependency on Vulnerable Third-Party Component and Uncontrolled Resource Consumption vulnerability in Wikimedia Foundation Mediawiki - DataTransfer Extension allows Excessive Allocation. This issue affects Mediawiki - DataTransfer Extension: from 1.46.0 before 1.47.0.

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Meta Information

Published
2026-09-29
Last Modified
2026-09-29
Generated
2026-09-29
AI Q&A
2026-09-29
EPSS Evaluated
N/A
NVD
CVE-2026-100242
EUVD
EUVD-2026-89081

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
wikimedia mediawiki_datatransfer_extension From 1.46.0 (inc) to 1.47.0 (exc)
phpspreadsheet phpspreadsheet From 1.30.5 (inc) to 5.8.0 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-400 The product does not properly control the allocation and maintenance of a limited resource.

Attack-Flow Graph

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Executive Summary

This vulnerability involves two issues in the Wikimedia Foundation MediaWiki DataTransfer Extension. First, it depends on a third-party component that has its own vulnerabilities. Second, it allows uncontrolled resource consumption, specifically excessive memory allocation. This occurs when processing certain files, leading to potential system slowdowns or crashes.

Impact Analysis

If you use the affected MediaWiki DataTransfer Extension versions (1.46.0 to before 1.47.0), an attacker could exploit this to cause denial of service by consuming excessive system resources. This might result in your wiki becoming unresponsive or crashing during file processing operations.

Mitigation Strategies

Update Mediawiki - DataTransfer Extension to version 1.47.0 or later to address the vulnerability. Ensure all third-party components are patched and monitor for unusual memory consumption during file processing.

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