CVE-2026-58034

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.

Score

CVSS 3.1 4.8 Medium

Status

Analyzed - c4f26cc8-17ff-4c99-b5e2-38fc1793eacc

Published

2026-07-01

Last modified

2026-10-25

Weaknesses

CWE-79

Affected products

• Mediawiki (Mediawiki)
• Checkuser (Wikimedia Foundation)

References

• https://phabricator.wikimedia.org/T428820