CVE-2026-26045: Moodle

High severity, CVSS 7.2. EPSS: 0.8% chance of exploitation in the next 30 days.

A flaw was identified in Moodle’s backup restore functionality where specially crafted backup files were not properly validated during processing. If a malicious backup file is restored, it could lead to unintended execution of server-side code. Since restore capabilities are typically available to privileged users, exploitation requires authenticated access. Successful exploitation could result in full compromise of the Moodle server.

Affected products

• Moodle Moodle: before 4.5.9 (fixed in 4.5.9); from 5.0.0, before 5.0.5 (fixed in 5.0.5); from 5.1.0, before 5.1.2 (fixed in 5.1.2)

Published 2026-02-21. Last modified 2026-06-17.