CVE-2026-105220: Klembot Twinejs

High severity, CVSS 7.8. EPSS: 0.2% chance of exploitation in the next 30 days.

Twine 2 desktop through 2.12.0 contains a cross-site scripting vulnerability in importStories() that executes markup from imported story files in the editor window. Attackers can craft a story file whose script calls the twineElectron openWithScratchFile IPC bridge to write and open a .bat file, executing code as the user.

Affected products

• Klembot Twinejs: up to and including 2.12.0

Published 2026-10-04. Last modified 2026-10-06.