Lupa has a Sandbox escape and RCE due to incomplete attribute_filter enforcement in getattr / setattr

{
  "id": "95219319d19c5e30215ce771e0bda0894e55f0e95234232a5ffa577cf494aebc",
  "url": "https://osv.dev/vulnerability/CVE-2026-34444",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Lupa has a Sandbox escape and RCE due to incomplete attribute_filter enforcement in getattr / setattr",
    "summary": "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.",
    "evidence": "osv:CVE-2026-34444",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-34444",
      "aliases": [
        "CVE-2026-34444",
        "GHSA-69v7-xpr6-6gjm",
        "PYSEC-2026-2613"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "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"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/scoder/lupa",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "dd520d06ac8229fa8b584a3759887d61f0e6019b"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "2.6"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  },
                  {
                    "cpe": "cpe:2.3:a:scoder:lupa:*:*:*:*:*:python:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "2.6"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "lupa-2.6",
            "lupa-2.5",
            "lupa-2.4",
            "lupa-2.3",
            "lupa-2.2",
            "lupa-2.1-2",
            "lupa-2.1-1",
            "lupa-2.1",
            "lupa-2.0",
            "lupa-1.9",
            "lupa-1.8",
            "lupa-1.7",
            "lupa-1.6",
            "lupa-1.5",
            "lupa-1.4",
            "lupa-1.3",
            "lupa-1.2",
            "lupa-1.1",
            "lupa-1.0.1",
            "lupa-1.0",
            "lupa-1.0b1",
            "lupa-0.21",
            "lupa-0.20",
            "lupa-0.19",
            "lupa-0.18",
            "lupa-0.17",
            "lupa-0.16",
            "lupa-0.15",
            "lupa-0.14",
            "lupa-0.13.1",
            "lupa-0.13",
            "lupa-0.12",
            "lupa-0.10",
            "lupa-0.8",
            "lupa-0.7",
            "lupa-0.6",
            "lupa-0.5",
            "lupa-0.4",
            "lupa-0.3",
            "lupa-0.2"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-34444.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:21.053186975Z",
      "provider": "osv",
      "references": [
        "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-34444.json",
        "https://access.redhat.com/errata/RHSA-2026:22993",
        "https://access.redhat.com/security/cve/CVE-2026-34444",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/34xxx/CVE-2026-34444.json",
        "https://github.com/scoder/lupa/security/advisories/GHSA-69v7-xpr6-6gjm",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-34444",
        "https://bugzilla.redhat.com/show_bug.cgi?id=2455413"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-284",
          "CWE-639"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/34xxx/CVE-2026-34444.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-34444",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 487205,
  "published_at": "2026-04-06T15:30:30.525+00:00"
}