CVE-2026-58030: SyntaxHighlight stored XSS via unsanitized 'linelinks' attribute

Published Jul 1, 2026
·
Updated

Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation SyntaxHighlightGeSHi.

This vulnerability is associated with program files includes/SyntaxHighlight.Php.

This issue affects SyntaxHighlightGeSHi: from before 1.46.0, 1.45.4, 1.44.6, 1.43.9.

Affected Software

8 affected components
Wikimedia Foundation SyntaxHighlight_GeSHi>undefined
Wikimedia Foundation SyntaxHighlight_GeSHi=1.45.4
Wikimedia Foundation SyntaxHighlight_GeSHi=1.44.6
Wikimedia Foundation SyntaxHighlight_GeSHi=1.43.9
MediaWiki MediaWiki>=1.43.0<1.43.9
MediaWiki MediaWiki>=1.44.0<1.44.6
MediaWiki MediaWiki>=1.45.0<1.45.4
MediaWiki MediaWiki=1.46.0-rc0

Event History

Jul 1, 2026
CVE Published
via MITRE·02:58 PM
Data Sourced
via MITRE·02:58 PM
DescriptionWeakness
Data Sourced
via NVD·04:16 PM
DescriptionSeverityWeaknessAffected Software
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Frequently Asked Questions

1

What is the severity of CVE-2026-58030?

The severity of CVE-2026-58030 is classified as medium with a CVSS score of 5.3.

2

What type of vulnerability is CVE-2026-58030?

CVE-2026-58030 is a stored XSS (Cross-site Scripting) vulnerability due to improper neutralization of input.

3

Which software is affected by CVE-2026-58030?

CVE-2026-58030 affects the Wikimedia Foundation's SyntaxHighlight_GeSHi software prior to version 1.46.0.

4

How can I fix CVE-2026-58030?

To fix CVE-2026-58030, update to the latest version of SyntaxHighlight_GeSHi to ensure input sanitization.

5

What is the impact of CVE-2026-58030?

Exploitation of CVE-2026-58030 can lead to unauthorized execution of malicious scripts in the context of affected web pages.

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