Quick answers
- Is CVE-2026-34093 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-34093 being exploited in the wild.
- How severe is CVE-2026-34093?
- Medium severity, with a CVSS score of 5.3, published 11 May 2026.
- Which products and versions are affected?
- Wikimedia Foundation MediaWiki < 1.43.7, < 1.44.4, < 1.45.2, Before 1.43.7, 1.44.4, 1.45.2.
- Is there a fix for CVE-2026-34093?
- 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-2026-34093 attacked?
- It is attacked over the network, in a web application.
- Am I affected by CVE-2026-34093?
- 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 MediaWiki's 'SpecialUserRights.php' component. The flaw allows an authenticated attacker with low privileges to access sensitive data that should be restricted to higher-level administrators. Exploitation requires network access and a degree of user interaction. The issue has been addressed in MediaWiki versions 1.43.7, 1.44.4, and 1.45.2. An attacker successfully leveraging this vulnerability can gain unauthorized insight into user rights configurations or associated metadata.
Affected products
- Wikimedia Foundation MediaWiki Before 1.43.7, 1.44.4, 1.45.2
Timeline
- 2026-05-11: disclosed
- 2026-05-11: advisory