# CVE-2026-22208

## Summary

- **CVE ID:** CVE-2026-22208
- **Severity:** CRITICAL
- **CVSS Score:** 9.6 (CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H)
- **CWE:** CWE-749, CWE-829
- **Published:** Feb 17, 2026
- **Last Modified:** Jul 14, 2026

## Description

OpenS100 (the reference implementation S-100 viewer) prior to commit 753cf29 contain 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 (0)

## References

- [CNA](https://www.mdpi.com/1424-8220/26/4/1246)
- [CNA](https://github.com/S-100ExpertTeam/OpenS100/commit/753cf294434e8d3961f20a567c4d99151e3b530d)
- [CNA](https://www.vulncheck.com/advisories/opens100-portrayal-engine-unrestricted-lua-standard-library-access)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.92%
- **EPSS Percentile:** 58.3

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._