CVE-2026-5266: Wikimedia Foundation Echo

Low severity, CVSS 2.3. EPSS: 0.4% chance of exploitation in the next 30 days.

Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Wikimedia Foundation Echo. This vulnerability is associated with program files includes/Api/ApiEchoNotifications.Php. This issue affects Echo: from * before 1.43.7, 1.44.4, 1.45.2.

Affected products

• Wikimedia Foundation Echo

Published 2026-05-11. Last modified 2026-06-17.