CVE-2026-26378: Koha

Medium severity, CVSS 5.4. EPSS: 0.5% chance of exploitation in the next 30 days.

Cross Site Scripting vulnerability in Koha 25.11 and before allows a remote attacker to execute arbitrary code via file upload function in Invoice features

Affected products

• Koha Koha: up to and including 25.11.00

Published 2026-06-03. Last modified 2026-07-22.