CVE-2026-50766 Cross-site scripting in n/a

Medium 5.4 Published 26 Jun 2026 Updated 5 Jul 2026

An authenticated attacker with edit permissions can inject arbitrary scripts into item notes, leading to stored XSS on the OPAC detail page.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Over the internet
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2026-50766?

CVE-2026-50766 is a medium-severity cross-site scripting vulnerability in n/a, published on 26 Jun 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

Official description

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).

Weakness: CWE-79

Which versions are affected by CVE-2026-50766?

It affects 1 product.

Products include Koha Koha.

How do I fix CVE-2026-50766?

No fix has been published for CVE-2026-50766 yet. Limit exposure of the affected software until one is available.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2026-50766 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-50766 exists.

Sources

Also known as GHSA-vpm8-cwf9-2c7w.