CVE-2026-34096 Guardian Language-System XSS via name Parameter in designer.php
An authenticated attacker can execute arbitrary scripts in a victim's browser via the name parameter in designer.php.
- 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-2026-34096?
CVE-2026-34096 is a medium-severity cross-site scripting vulnerability in guardian language-system, published on 1 Jul 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
Guardian language-system fails to sanitize the name GET parameter before outputting it into an HTML input value attribute in designer.php (line 57). An authenticated attacker can craft a URL containing script tags that execute in the victim's browser session.
Weakness: CWE-79
Which versions are affected by CVE-2026-34096?
How do I fix CVE-2026-34096?
No fix has been published for CVE-2026-34096 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-2026-34096 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-34096 exists.
Sources
Also known as GHSA-ggfh-fv42-r856.