CVE-2026-58025 Wikimedia Foundation CVE debrief

Who should care

Users of MediaWiki, especially those running versions before 1.46.0, 1.45.4, 1.44.6, and 1.43.9, should be aware of this vulnerability and take necessary actions to protect their installations. This includes reviewing and monitoring the affected files for any suspicious activity and implementing additional security measures.

Technical summary

The vulnerability is caused by the deserialization of untrusted data in MediaWiki, which could allow an attacker to execute arbitrary code on the server. The issue has been identified in several files, including WikiImporter.Php, WikiRevision.Php, and LogEntryBase.Php. This affects MediaWiki versions before 1.46.0, 1.45.4, 1.44.6, and 1.43.9. Users should review and monitor the affected files for any suspicious activity and implement additional security measures to protect their installations.

Defensive priority

Medium

Recommended defensive actions

• Update MediaWiki to version 1.46.0, 1.45.4, 1.44.6, or 1.43.9, or later
• Review and monitor the affected files for any suspicious activity
• Implement additional security measures, such as validating user input and restricting access to sensitive areas of the application
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.
• Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance.
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed.
• Check relevant monitoring, detection, and logs for exposed assets that need extra review.

Evidence notes

The CVE record was published on 2026-07-01T16:16:49.703Z and was last modified on 2026-07-09T19:34:14.067Z. The NVD entry is currently Analyzed. This issue is associated with program files includes/Import/WikiImporter.Php, includes/Import/WikiRevision.Php, and includes/Logging/LogEntryBase.Php. The vulnerability is caused by the deserialization of untrusted data in MediaWiki. This could allow an attacker to execute arbitrary code on the server.

Official resources