Medium [CVE-2026-58031] Cross-site scripting vulnerability due to improper input neutralization
This medium-severity Red Hat Linux advisory covers CVE-2026-58031.
Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.
VulniPulse record published Record updated
Summary
Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation MediaWiki. This vulnerability is associated with program files resources/src/mediawiki.
Special. Apisandbox/ApiSandboxLayout.Js.
This issue affects MediaWiki: from 1.46.0-rc.0 before 1.46.0.
When a user views an affected page, the attacker's script can execute in their browser, potentially leading to information disclosure, session hijacking, or defacement of the website. Moderate: A cross-site scripting (XSS) vulnerability in MediaWiki allows a remote attacker to inject malicious scripts into web pages.
Red Hat severity: Moderate — CVSS 4.6 (CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N). Weakness: CWE-79.
Is CVE-2026-58031 exploited?
No exploitation is reported in the sources VulniPulse tracks: CVE-2026-58031 is not in the CISA KEV catalog (checked ) and this advisory does not report exploitation. That is not proof the vulnerability cannot be exploited.
How do I fix CVE-2026-58031?
The advisory VulniPulse tracks names no fixed release. Follow Red Hat's guidance for workarounds and updates.
Confirm against the vendor advisory before you patch.
- < 1.46.0-rc
- < 1.46.0
Official advisory · high-confidence parse· fetched 13 days ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists. Confirm against the vendor advisory.
Official advisory · high-confidence parse· fetched 13 days ago·verify at source
Mitigation checklist
- Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
Official advisory · high-confidence parse· fetched 13 days ago·verify at source
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