Quick answers
- Is CVE-2026-34088 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-34088 being exploited in the wild.
- How severe is CVE-2026-34088?
- High severity, with a CVSS score of 7.5, published 11 May 2026.
- Which products and versions are affected?
- Wikimedia Foundation MediaWiki before 1.43.7, 1.44.4, 1.45.2.
- Is there a fix for CVE-2026-34088?
- 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-2026-34088 attacked?
- It is attacked over the network, in a web application.
- Am I affected by CVE-2026-34088?
- 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
A sensitive information disclosure vulnerability (CWE-200) exists in Wikimedia Foundation MediaWiki. The flaw allows an unauthorized actor to access data that is intended to be restricted. The vulnerability is reachable over the network and requires some level of user interaction (UI:P) according to the CVSS 4.0 vector. It affects multiple branches of the software, and fixes have been released in versions 1.43.7, 1.44.4, and 1.45.2. Attackers can leverage this to gain insights into the system or user data without proper authorization.
Affected products
- Wikimedia Foundation MediaWiki before 1.43.7, 1.44.4, 1.45.2
Timeline
- 2026-05-11: disclosed: Initial publication of the CVE record.