# CVE-2026-58033: Wikimedia Foundation MediaWiki information disclosure in InfoAction

Source: https://junglewise.ai/threats/cve-2026-58033-wikimedia-foundation-mediawiki-information-disclosure-in  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-07-01. Updated: 2026-07-01  
License: CC BY 4.0 with a link back

CVE-2026-58033 · Severity: info · CVSS 5.3 · Published 2026-07-01

MediaWiki, the software powering Wikipedia and many other wikis, contains a vulnerability that could allow unauthorized individuals to view sensitive information. This issue occurs within the page information component, potentially exposing data that should be restricted. While the impact is limited to information disclosure, it could compromise the privacy of wiki operations or user metadata.

Technologies: [Wikimedia Foundation MediaWiki](https://junglewise.ai/threats/technologies/mediawiki). Vendors: [Wikimedia Foundation](https://junglewise.ai/threats/vendors/wikimedia-foundation).

## Quick answers

**Is CVE-2026-58033 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-58033 being exploited in the wild.

**How severe is CVE-2026-58033?** Informational severity, with a CVSS score of 5.3, published 1 July 2026.

**Which products and versions are affected?** Wikimedia Foundation MediaWiki Before 1.46.0, 1.45.4, 1.44.6, 1.43.9.

**Is there a fix for CVE-2026-58033?** 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-2026-58033 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-58033?** 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 'includes/Actions/InfoAction.php' component. The flaw allows a remote attacker to access sensitive data that should be restricted to authorized users. The attack requires minimal technical skill and some user interaction, as indicated by the CVSS UI:P (User Interaction Required) metric. Successful exploitation results in a loss of confidentiality (VC:L). The issue has been addressed in versions 1.46.0, 1.45.4, 1.44.6, and 1.43.9.

## Affected products

- Wikimedia Foundation MediaWiki Before 1.46.0, 1.45.4, 1.44.6, 1.43.9

## Timeline

- 2026-07-01: advisory: NVD publication date

## References

- [https://phabricator.wikimedia.org/T427235](https://phabricator.wikimedia.org/T427235)

## Related threats

- [Mediawiki Wikibase Extension stored cross-site scripting](https://junglewise.ai/threats/cve-2026-100245-improper-neutralization-of-input-during-web-page-generation-xss)
- [Wikimedia Mediawiki UploadWizard DOM XSS in Flickr titles](https://junglewise.ai/threats/cve-2026-100381-improper-neutralization-of-input-during-web-page-generation-xss)
- [MediaWiki Wikibase reflected XSS in Special:SetLabel](https://junglewise.ai/threats/cve-2026-100380-improper-neutralization-of-input-during-web-page-generation-xss)
- [Wikimedia Foundation MediaWiki XSS in Logging and Special Pages](https://junglewise.ai/threats/cve-2026-58037-wikimedia-foundation-mediawiki-xss-in-logging-and-special-pages)
- [Wikimedia Foundation MediaWiki Information Exposure in User API](https://junglewise.ai/threats/cve-2026-58036-wikimedia-foundation-mediawiki-information-exposure-in-user-api)