CVE-2026-22208: OPENS100 Project OPENS100

Critical severity, CVSS 9.6. EPSS: 1% chance of exploitation in the next 30 days.

OpenS100 (the reference implementation S-100 viewer) prior to commit 753cf29 contains a remote code execution vulnerability via an unrestricted Lua interpreter. The Portrayal Engine initializes Lua using luaL_openlibs() without sandboxing or capability restrictions, exposing standard libraries such as 'os' and 'io' to untrusted portrayal catalogues. An attacker can provide a malicious S-100 portrayal catalogue containing Lua scripts that execute arbitrary commands with the privileges of the OpenS100 process when a user imports the catalogue and loads a chart.

Affected products

• OPENS100 Project OPENS100

Published 2026-02-17. Last modified 2026-07-14.