Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
Lupa, versions up to and including 2.6, has a flaw where its attribute_filter is not applied to attribute access made through the getattr and setattr built-ins. An attacker who can run Lua code in an application that relies on attribute_filter as a sandbox can use these built-ins to reach Python internals and run arbitrary commands in the host process. No fixed version is listed. Users can mitigate by disabling the Python builtins with register_builtins=False and not running untrusted Lua code.
Not analysed yet
We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.
Severity and exploitation
| Score | Rating | CVSS | Vector | Source |
|---|---|---|---|---|
| 7.9 | High | 4.0 | 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 | CNA (GitHub_M) |
- CISA KEV Not listed.
- EPSS 0.0064, the 50th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 14:34 UTC First seen by agentprime
- 31 Oct 2026, 14:34 UTC Confirmed by OSV