CRITICAL9.8

PYSEC-2026-570

web2py remote code execution via hardcoded encryption key in session.connect function

Quick fix

PYSEC-2026-570 — web2py: upgrade to the fixed version with the command below.

pip install --upgrade 'web2py>=2.14.2'

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.

Are you affected?

Enter the version of the package you're using.

Affected packages

PyPI/web2py

Introduced in: 0Fixed in: 2.14.2

Fixpip install --upgrade 'web2py>=2.14.2'

References

https://nvd.nist.gov/vuln/detail/CVE-2016-3953[ADVISORY]
https://github.com/web2py/web2py/issues/1205[WEB]
https://github.com/web2py/web2py/commit/9706d125b42481178d2b423de245f5d2faadbf40[WEB]
https://devco.re/blog/2017/01/03/web2py-unserialize-code-execution-CVE-2016-3957[WEB]
https://github.com/web2py/web2py[PACKAGE]
https://github.com/web2py/web2py/blob/R-2.14.1/applications/examples/models/session.py[WEB]
https://usn.ubuntu.com/4030-1[WEB]
https://pypi.org/project/web2py[PACKAGE]
https://github.com/advisories/GHSA-q2rq-qgcf-m22w[ADVISORY]