{"cve":"CVE-2026-102734","nvd":{"published":"2026-10-13T16:17:09.820","modified":"2026-10-16T20:04:29.760","status":"Deferred","description":"asteval is a Python expression evaluator designed for restricted execution. Prior to 1.0.9, in asteval/astutils.py, the default Interpreter with numpy enabled exposes a ctypes type and permits from_address memory access. safe_getattr blocks the ctypes module but not reachable ctypes type objects, while attribute assignments use unfiltered setattr instead of safe_setattr. An attacker-controlled expression can derive an address with id, read memory through from_address, and write through an attribute assignment. The expression can read or corrupt arbitrary process memory, escape the intended sandbox, execute code, disclose secrets, or crash the host process. This issue is fixed in version 1.0.9.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","score":5.5},"cwes":["CWE-693","CWE-749","CWE-913"],"references":["https://github.com/lmfit/asteval/commit/a3e56e7f8ed567a4817684d94213b290359077b4","https://github.com/lmfit/asteval/pull/153","https://github.com/lmfit/asteval/releases/tag/1.0.9","https://github.com/lmfit/asteval/security/advisories/GHSA-9w56-46f6-3qhx"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:58:52.678897993+00:00"},"epss":{"cve":"CVE-2026-102734","score":0.00126,"percentile":0.02308,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-9w56-46f6-3qhx","url":"https://osv.dev/vulnerability/GHSA-9w56-46f6-3qhx","summary":"asteval Sandbox Escape: arbitrary native memory read/write via numpy ctypes in default asteval Interpreter","modified":"2026-10-14T02:56:19.430602789Z","packages":[{"ecosystem":"PyPI","name":"asteval","purl":"pkg:pypi/asteval","ranges":["<1.0.9"],"fixed":["1.0.9"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}