CVE-2026-39937 HIGH

CVE-2026-39937: Global vanishing does not completely remove user email

Vendor The Wikimedia Foundation
Product Mediawiki - CentralAuth Extension
Weakness CWE-212
Published April 7, 2026
Last update April 8, 2026
View on NVD All CVEs

CVSS base score

8.8/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality —
Integrity —

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:L/SC:L/SI:L/SA:L

What the vulnerability does

01Description

Improper removal of sensitive information before storage or transfer vulnerability in The Wikimedia Foundation Mediawiki - CentralAuth Extension allows Resource Leak Exposure. The issue has been remediated on the `master` branch, and in the release branches for MediaWiki versions 1.43, 1.44, and 1.45.

Key dates

02Disclosure timeline

April 7, 2026 CVE published
April 8, 2026 Record updated