CVE-2026-58025
Received Received - Intake

Deserialization Flaw in MediaWiki

Publication date: 2026-07-01

Last updated on: 2026-07-01

Assigner: wikimedia-foundation

Description
Deserialization of untrusted data vulnerability in Wikimedia Foundation MediaWiki. This vulnerability is associated with program files includes/Import/WikiImporter.Php, includes/Import/WikiRevision.Php, includes/Logging/LogEntryBase.Php. This issue affects MediaWiki: from * before 1.46.0, 1.45.4, 1.44.6, 1.43.9.

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Meta Information

Published
2026-07-01
Last Modified
2026-07-01
Generated
2026-07-01
AI Q&A
2026-07-01
EPSS Evaluated
N/A
NVD
CVE-2026-58025
EUVD
EUVD-2026-41031

Affected Vendors & Products

Showing 4 associated CPEs
Vendor Product Version / Range
wikimedia mediawiki to 1.46.0 (exc)
wikimedia mediawiki 1.45.4
wikimedia mediawiki 1.44.6
wikimedia mediawiki 1.43.9

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-502 The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.
CWE-94 The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment.

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Executive Summary

This vulnerability is a deserialization of untrusted data issue found in the Wikimedia Foundation's MediaWiki software. It involves certain program files such as includes/Import/WikiImporter.Php, includes/Import/WikiRevision.Php, and includes/Logging/LogEntryBase.Php. The vulnerability affects versions of MediaWiki before 1.46.0, including 1.45.4, 1.44.6, and 1.43.9.

Impact Analysis

The vulnerability allows deserialization of untrusted data, which can lead to security risks such as unauthorized code execution, data corruption, or other malicious actions depending on how the deserialized data is handled. Given the CVSS base score of 5.9, it represents a moderate severity risk that could impact the confidentiality, integrity, or availability of the affected MediaWiki installation.

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