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Vulnerability record · CVE-2026-34444 · published 6 April 2026

CVE-2026-34444: Scoder lupa improper access control vulnerability

Scoder · Lupa

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.

7.9 CVSS 4.0 High EPSS 0.80% · top 45.1% CWE-284 · Improper access controlCWE-639 · Insecure direct object reference
7.9CVSS 4.0 base score
0.80%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
5References, 1 tagged exploit
15 Jul 2026Last modified by NVD

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.

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:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/scoder/lupa/security/advisories/GHSA-69v7-xpr6-6gjm ExploitVendor Advisory
https://access.redhat.com/errata/RHSA-2026:22993
https://access.redhat.com/security/cve/CVE-2026-34444
https://bugzilla.redhat.com/show_bug.cgi?id=2455413
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-34444.json

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-34444), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.