Low severity · published Sep 30, 2026
CVE-2026-103439
Various rawParams() and escaped() updates to prevent XSS in Wikibase extension
0.3
CVSS
0.1%
EPSS
No
On KEV
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.
Exploitation
Is it being used?
Exploit prediction (EPSS)0.1% · higher than 1% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MW
MediaWiki Wikbase extension · The Wikimedia Foundation
1.46; 1.45; 1.43 · source: vendor
Affected product
MW
MediaWiki Wikbase extension
The Wikimedia Foundation