Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation MediaWiki,… (CVE-2026-58028)
Description
A Cross-site Scripting (XSS) vulnerability exists in Wikimedia Foundation MediaWiki and CentralAuth components. It involves improper neutralization of input during web page generation affecting multiple program files. The vulnerability impacts various versions of MediaWiki and CentralAuth prior to 1.46.0 and specific earlier versions. The CVSS score is 5.4, indicating a medium severity issue with potential confidentiality and integrity impacts but no availability impact.
CVSS v3.1
Score 5.4medium
Affected software
pkg:deb/ubuntu/mediawiki?arch=source&distro=bionicpkg:deb/ubuntu/mediawiki?arch=source&distro=esm-apps/focalpkg:deb/ubuntu/mediawiki?arch=source&distro=esm-apps/jammypkg:deb/ubuntu/mediawiki?arch=source&distro=esm-apps/noblepkg:deb/ubuntu/mediawiki?arch=source&distro=questingpkg:deb/ubuntu/mediawiki?arch=source&distro=stonkingpkg:deb/ubuntu/mediawiki?arch=source&distro=resoluteRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-58028 describes an XSS vulnerability in Wikimedia Foundation's MediaWiki and CentralAuth components due to improper input neutralization during web page generation. The affected program files include includes/Api/ApiFormatBase.Php, includes/Api/ApiHelp.Php, includes/ResourceLoader/Module.Php, includes/Hooks/Handlers/PageDisplayHookHandler.Php, and includes/LogFormatter/PermissionChangeLogFormatter.Php. This vulnerability affects MediaWiki and CentralAuth versions prior to 1.46.0 and certain earlier versions (1.45.4, 1.44.6, 1.43.9). The CVSS 3.1 vector indicates network attack vector, low attack complexity, requiring privileges and user interaction, with a scope change and partial confidentiality and integrity impact.
Potential Impact
The vulnerability allows an attacker with some privileges and requiring user interaction to execute cross-site scripting attacks, potentially leading to partial disclosure of confidential information and modification of data integrity within the affected MediaWiki and CentralAuth installations. There is no impact on availability.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, administrators should monitor vendor communications for patches addressing CVE-2026-58028. No vendor advisory or patch links are provided in the current data.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- UBUNTU-CVE-2026-58028
- Osv Schema Version
- 1.7.0
- Ecosystems
- ["Ubuntu:18.04:LTS","Ubuntu:Pro:20.04:LTS","Ubuntu:Pro:22.04:LTS","Ubuntu:Pro:24.04:LTS","Ubuntu:25.10","Ubuntu:26.10","Ubuntu:26.04:LTS"]
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6ad3f5df2cdf04f65666347e
Added to database: 10/17/2026, 22:25:35 UTC
Last enriched: 10/18/2026, 00:33:48 UTC
Last updated: 10/18/2026, 00:33:48 UTC
Views: 2
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