CVE-2026-58034

EUVD-2026-41011
Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation CheckUser.

 This vulnerability is associated with program files modules/ext.CheckUser.TempAccounts/components/blockConnectedTempAccountsField.Vue.



This issue affects CheckUser: from 1.46.0-rc.0 before 1.46.0.
Cross-site Scripting
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
4.8 MEDIUM
NETWORK
LOW
HIGH
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: 6.56%
Affected Products (NVD)
VendorProductVersion
mediawikimediawiki
1.46.0:rc0
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://phabricator.wikimedia.org/T428820