CVE-2026-27375: Janstudio Gecko

High severity, CVSS 7.1. EPSS: 0.3% chance of exploitation in the next 30 days.

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in JanStudio Gecko gecko allows Reflected XSS.This issue affects Gecko: from n/a through <= 1.9.8.

Affected products

• Janstudio Gecko: up to and including 1.9.8

Published 2026-03-05. Last modified 2026-06-17.