High severity · published Jul 1, 2026
CVE-2026-58036
Users API leaks whether privileged users have their user groups disabled for lack of 2FA
7.5
CVSS
0.3%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 25% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
ME
MediaWiki · Wikimedia Foundation
1.46.0-rc.0 before 1.46.0 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-58036
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-58036
Permissions Required
https://phabricator.wikimedia.org/T425406
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