Quick answers
- Is CVE-2026-58037 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-58037 being exploited in the wild.
- How severe is CVE-2026-58037?
- Informational severity, with a CVSS score of 0, published 1 July 2026.
- Which products and versions are affected?
- Wikimedia Foundation MediaWiki < 1.46.0, < 1.45.4, < 1.44.6, < 1.43.9.
- Is there a fix for CVE-2026-58037?
- 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-2026-58037 attacked?
- It is attacked over the network, in a web application.
- Am I affected by CVE-2026-58037?
- 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 Cross-Site Scripting (XSS) vulnerability exists in MediaWiki's logging and special page components, specifically within several formatter files including LogFormatter.php and SpecialVersion.php. The issue stems from improper neutralization of input before it is rendered in the web interface. An attacker with low privileges (PR:L) could potentially inject malicious scripts that execute in the context of another user's browser session, provided there is some form of user interaction (UI:A). The vulnerability is addressed in versions 1.46.0, 1.45.4, 1.44.6, and 1.43.9.
Affected products
- Wikimedia Foundation MediaWiki < 1.46.0, < 1.45.4, < 1.44.6, < 1.43.9
Timeline
- 2026-07-01: disclosed
- 2026-07-01: advisory