What’s Vulnerable › Vulnerabilities

CVE-2026-103439: Various rawParams() and escaped() updates to prevent XSS in Wikibase extension

• Severity: low (CVSS 0.3 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-30 · updated 2026-09-30
• Weakness: CWE-80

Description

Improper neutralization of Script-Related HTML tags in a web page (basic XSS) vulnerability in The Wikimedia Foundation MediaWiki Wikbase extension allows Cross-Site Scripting (XSS). This issue affects MediaWiki Wikbase extension: 1.46, 1.45, and 1.43.

Affected products

• The Wikimedia Foundation MediaWiki Wikbase extension: 1.46, 1.45, 1.43

References

• https://gerrit.wikimedia.org/r/q/Ie7a35b211565148e0cae437a4a8c41633b81f1b3
• https://phabricator.wikimedia.org/T182213

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