Wikimedia MediaWiki up to 1.45.x/1.45.3/1.44.5/1.43.8 Parser.Php information disclosure

Summaryinfo

A vulnerability described as problematic has been identified in Wikimedia MediaWiki up to 1.45.x/1.45.3/1.44.5/1.43.8. This vulnerability affects unknown code of the file includes/Parser/Parser.Php. The manipulation results in information disclosure. This vulnerability is identified as CVE-2026-58026. The attack can be executed remotely. There is not any exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in Wikimedia MediaWiki up to 1.45.x/1.45.3/1.44.5/1.43.8. It has been classified as problematic. Affected is an unknown code block of the file includes/Parser/Parser.Php. The manipulation with an unknown input leads to a information disclosure vulnerability. CWE is classifying the issue as CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. This is going to have an impact on confidentiality. CVE summarizes:

Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Wikimedia Foundation MediaWiki. This vulnerability is associated with program files includes/Parser/Parser.Php. This issue affects MediaWiki: from * before 1.46.0, 1.45.4, 1.44.6, 1.43.9.

The advisory is shared for download at phabricator.wikimedia.org. This vulnerability is traded as CVE-2026-58026 since 06/27/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1592.

By approaching the search of inurl:includes/Parser/Parser.Php it is possible to find vulnerable targets with Google Hacking.

Upgrading to version 1.46.0, 1.45.4, 1.44.6 or 1.43.9 eliminates this vulnerability.

VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

• Content Management System

Vendor

• Wikimedia

Name

• MediaWiki

Version

• 1.0
• 1.1
• 1.2
• 1.3
• 1.4
• 1.5
• 1.6
• 1.7
• 1.8
• 1.9
• 1.10
• 1.11
• 1.12
• 1.13
• 1.14
• 1.15
• 1.16
• 1.17
• 1.18
• 1.19
• 1.20
• 1.21
• 1.22
• 1.23
• 1.24
• 1.25
• 1.26
• 1.27
• 1.28
• 1.29
• 1.30
• 1.31
• 1.32
• 1.33
• 1.34
• 1.35
• 1.36
• 1.37
• 1.38
• 1.39
• 1.40
• 1.41
• 1.42
• 1.43
• 1.43.0
• 1.43.1
• 1.43.2
• 1.43.3
• 1.43.4
• 1.43.5
• 1.43.6
• 1.43.7
• 1.43.8
• 1.44
• 1.44.0
• 1.44.1
• 1.44.2
• 1.44.3
• 1.44.4
• 1.44.5
• 1.45
• 1.45.0
• 1.45.1
• 1.45.2
• 1.45.3

License

• open-source

CPE 2.3info

• 🔒
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CPE 2.2info

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Entryinfo

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