CVE-2026-58036 PUBLISHED

Users API leaks whether privileged users have their user groups disabled for lack of 2FA

Assigner: wikimedia-foundation
Reserved: 27.06.2026 Published: 01.07.2026 Updated: 01.07.2026

Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Wikimedia Foundation MediaWiki.

This vulnerability is associated with program files includes/Api/ApiQueryAllUsers.Php, includes/Api/ApiQueryUsers.Php, includes/Permissions/PermissionManager.Php, includes/User/UserGroupManager.Php.

Metrics

CVSS 4.0

CVSS Vector: CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
CVSS Score: 2.1

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	Low	Confidentiality	None
Attack Complexity	High	Integrity	None	Integrity	None
Attack Requirements	None	Availability	None	Availability	None
Privileges Required	Low
User Interaction	Passive

CVSS 4.0

Product Status

Vendor	Wikimedia Foundation
Product	MediaWiki
Versions	Default: unaffected affected from 1.46.0-rc.0 to 1.46.0 (excl.)

References

https://phabricator.wikimedia.org/T425406

Problem Types

CWE-200 Exposure of Sensitive Information to an Unauthorized Actor CWE