What’s Vulnerable › Vulnerabilities

CVE-2026-58036: Users API leaks whether privileged users have their user groups disabled for lack of 2FA

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-01 · updated 2026-10-25
• Weakness: CWE-200

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.

Affected products

• Wikimedia Foundation MediaWiki: 1.46.0-rc0

References

• https://phabricator.wikimedia.org/T425406

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