Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation MediaWiki. (CVE-2026-58032)
Description
A Cross-site Scripting (XSS) vulnerability exists in Wikimedia Foundation MediaWiki due to improper neutralization of input during web page generation. This affects multiple versions of MediaWiki prior to 1.46.0, including specific versions such as 1.45.4, 1.44.6, and 1.43.9. The vulnerability is associated with the program file resources/src/mediawiki.Api/index.Js. The CVSS v3.1 score is 6.1, indicating a medium severity issue.
CVSS v3.1
Score 6.1medium
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-2026-58032 is an XSS vulnerability in MediaWiki caused by improper input neutralization during web page generation. This flaw is located in the resources/src/mediawiki.Api/index.Js file and affects MediaWiki versions before 1.46.0, including 1.45.4, 1.44.6, and 1.43.9. The vulnerability allows an attacker to inject malicious scripts that could lead to partial confidentiality and integrity impacts, but no availability impact. The CVSS vector indicates network attack vector, low attack complexity, no privileges required, user interaction required, and scope change.
Potential Impact
Successful exploitation could allow an attacker to execute arbitrary scripts in the context of the affected web application, potentially leading to partial loss of confidentiality and integrity of data. There is no impact on availability. The vulnerability requires user interaction and can be exploited remotely without privileges.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, users should apply any recommended temporary mitigations from the vendor. Avoid relying on generic mitigations unless specifically advised by the vendor.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- UBUNTU-CVE-2026-58032
- 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: 6ad3f5df2cdf04f65666347a
Added to database: 10/17/2026, 22:25:35 UTC
Last enriched: 10/18/2026, 00:33:27 UTC
Last updated: 10/18/2026, 00:33:27 UTC
Views: 2
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