CVE-2026-34444 HIGH

CVE-2026-34444: Lupa has a Sandbox escape and RCE due to incomplete attribute_filter enforcement in getattr / setattr

Vendor Scoder
Product lupa
Weakness CWE-284
Published April 6, 2026
Last update April 6, 2026

CVSS base score

7.9/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality
Integrity

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

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

April 6, 2026 CVE published
April 6, 2026 Record updated