by Kastro
Paper/Archive/CVE-2026-22208

CVE-2026-22208

OpenS100 Project OpenS100 — OpenS100 Portrayal Engine Unrestricted Lua Standard Library Access

EPSS 1%public exploitCVSS 9.6
critical.is priorityof 100
52
CVSS 9.6 (CNA)9.6 / 10 × 3028.8Not in CISA KEV+300.0EPSS percentile 65.0.650 × 2013.0Exploit: SSVC poc+1010.0SSVC exploitation: poc+100.0
Description · from the CVE record

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

ProductAffectedFixed inSource
OpenS100< 753cf294434e8d3961f20a567c4d99151e3b530d753cf294434e8d3961f20a567c4d99151e3b530dCNA

Scores by source

VulnCheck (CNA)9.6CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
VulnCheck (CNA)9.4CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
CISA ADPSSVCExploitation: poc · Automatable: no · Technical impact: total

References

exploitmdpi.com/1424-8220/26/4/1246patchgithub.com/S-100ExpertTeam/OpenS100/commit/753cf294434e8d3961f20a567c4d99151e3b530dwriteupvulncheck.com/advisories/opens100-portrayal-engine-unrestricted-lua-standard-library-access