Bug 2461027 (CVE-2026-41196)

Summary: CVE-2026-41196 luanti: minetest: luajit: Luanti (Minetest): Arbitrary code execution and full filesystem access via malicious mod sandbox escape
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
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Priority: high    
Version: unspecifiedKeywords: Security
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OS: Linux   
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A flaw was found in Luanti (formerly Minetest), an open-source game platform. A malicious mod, when executed within the LuaJIT environment, can bypass security restrictions designed to isolate it. This allows the mod to execute unauthorized code and gain full access to the user's device, potentially leading to a complete system compromise.
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Bug Depends On: 2461061    
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Description OSIDB Bzimport 2026-04-23 02:01:38 UTC 
Luanti (formerly Minetest) is an open source voxel game-creation platform. Starting in version 5.0.0 and prior to version 5.15.2, a malicious mod can trivially escape the sandboxed Lua environment to execute arbitrary code and gain full filesystem access on the user's device. This applies to the server-side mod, async and mapgen as well as the client-side (CSM) environments. This vulnerability is only exploitable when using LuaJIT. Version 5.15.2 contains a patch. On release versions, one can also patch this issue without recompiling by editing `builtin/init.lua` and adding the line `getfenv = nil` at the end. Note that this will break mods relying on this function (which is not inherently unsafe).