EUVD-2026-19346
GHSA-69v7-xpr6-6gjm
CVSS Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Lifecycle Timeline
3Tags
Description
Lupa integrates the runtimes of Lua or LuaJIT2 into CPython. In 2.6 and earlier, attribute_filter is not consistently applied when attributes are accessed through built-in functions like getattr and setattr. This allows an attacker to bypass the intended restrictions and eventually achieve arbitrary code execution.
Analysis
Arbitrary code execution in Lupa (Python-Lua integration library) versions ≤2.6 allows unauthenticated remote attackers to bypass attribute filtering controls via Python's getattr/setattr built-ins. The vulnerability enables attackers to circumvent sandbox restrictions designed to limit Lua runtime access to sensitive Python objects, ultimately achieving code execution in the CPython host process. …
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Remediation
Within 24 hours: Identify all systems running Lupa ≤2.6 and document which accept untrusted or user-supplied Lua scripts. Within 7 days: Implement input validation to reject complex Lua scripts and restrict application execution contexts. …
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External POC / Exploit Code
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