CVE-2026-50766: Koha

Medium severity, CVSS 5.4. EPSS: 0.3% chance of exploitation in the next 30 days.

A stored cross-site scripting (XSS) vulnerability in the OPAC item detail page of Koha Library Management System 0 through 25.11 versions allow an authenticated remote attacker with edit_items permission to inject arbitrary web scripts via the item public notes field (items.itemnotes).

Affected products

• Koha Koha: up to and including 25.11.00

Published 2026-06-26. Last modified 2026-07-05.