PT-2026-53639 · Pypi · Web2Py

Published 2026-06-29 · Updated 2026-06-29

OSV

CVSS v3.1

9.8

Critical

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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.

Fix

Related Identifiers

PYSEC-2026-570

Affected Products

Web2Py

References · 10

• https://nvd.nist.gov/vuln/detail/CVE-2016-3953 · Security Note
• https://osv.dev/vulnerability/PYSEC-2026-570 · Vendor Advisory
• https://github.com/web2py/web2py/commit/9706d125b42481178d2b423de245f5d2faadbf40 · Note
• https://github.com/web2py/web2py · Note
• https://github.com/web2py/web2py/issues/1205 · Note
• https://github.com/web2py/web2py/blob/R-2.14.1/applications/examples/models/session.py · Note
• https://devco.re/blog/2017/01/03/web2py-unserialize-code-execution-CVE-2016-3957 · Note
• https://github.com/advisories/GHSA-q2rq-qgcf-m22w · Note
• https://usn.ubuntu.com/4030-1 · Note
• https://pypi.org/project/web2py · Note