Quick answers
- Is CVE-2026-58036 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-58036 being exploited in the wild.
- How severe is CVE-2026-58036?
- Informational severity, with a CVSS score of 2.1, published 1 July 2026.
- Which products and versions are affected?
- Wikimedia Foundation MediaWiki 1.46.0-rc.0 to 1.46.0.
- Is there a fix for CVE-2026-58036?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-58036 attacked?
- It is attacked over the network, in a web application.
- Am I affected by CVE-2026-58036?
- Check whether you run Wikimedia Foundation MediaWiki at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
An information disclosure vulnerability (CWE-200) exists in Wikimedia Foundation MediaWiki. The flaw is located within several core components, including ApiQueryAllUsers.php, ApiQueryUsers.php, PermissionManager.php, and UserGroupManager.php. An attacker with low privileges could potentially exploit these API endpoints to retrieve sensitive user information that should not be accessible. The attack requires network access and involves some level of user interaction or specific environmental conditions (AC:H). The issue affects versions starting from 1.46.0-rc.0 and is addressed in version 1.46.0.
Affected products
- Wikimedia Foundation MediaWiki 1.46.0-rc.0 to 1.46.0
Timeline
- 2026-07-01: disclosed
- 2026-07-01: advisory