{"id":"CVE-2016-3953","aliases":["GHSA-q2rq-qgcf-m22w","PYSEC-2026-570"],"url":"https://o3.security/vulnerability/CVE-2016-3953","summary":"web2py remote code execution via hardcoded encryption key in session.connect function","details":"The sample web application in web2py before 2.14.2 might allow remote attackers to execute arbitrary code via vectors involving use of a hardcoded encryption key when calling the session.connect function.","published":"2018-02-06T18:29:00.273Z","modified":"2026-08-07T14:49:21.437384Z","cvss":{"score":9.8,"severity":"CRITICAL","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":1,"affectedPackages":[{"ecosystem":"PyPI","name":"web2py","fixedVersion":"2.14.2"}],"fix":null,"references":[{"type":"WEB","url":"https://usn.ubuntu.com/4030-1/"},{"type":"ADVISORY","url":"https://github.com/web2py/web2py/blob/R-2.14.1/applications/examples/models/session.py"},{"type":"EVIDENCE","url":"https://devco.re/blog/2017/01/03/web2py-unserialize-code-execution-CVE-2016-3957/"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-07T14:49:21.437384Z"}}