CVE-2026-58036 Users API leaks whether privileged users have their user groups disabled for lack of 2FA
Attackers can determine if privileged users have disabled user groups due to missing 2FA, exposing sensitive security posture information.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-58036?
CVE-2026-58036 is a low-severity vulnerability in Mediawiki Mediawiki, published on 1 Jul 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official 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.
Weakness: CWE-200
Which versions are affected by CVE-2026-58036?
It affects 1 product.
Products include Mediawiki Mediawiki.
How do I fix CVE-2026-58036?
No fix has been published for CVE-2026-58036 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-58036 being exploited?
There is no known exploitation of CVE-2026-58036 in the wild and no public exploit code.
Other vulnerabilities in Mediawiki Mediawiki
Sources
Also known as GHSA-qf2r-x8qv-xrwx, UBUNTU-CVE-2026-58036.