PYSEC-2026-1874 try/except* clauses could allow bypass RestrictedPython via type confusion bug in the CPython interpreter

Impact Via a type confusion bug in the CPython interpreter when using try/except RestrictedPython could be bypassed. We believe this should be fixed upstream in Python itself until that we remove support for try/except from RestrictedPython. It has been fixed for some Python versions. Patches...

Access of Resource Using Incompatible Type ('Type Confusion')

Overview RestrictedPython is a RestrictedPython is a defined subset of the Python language which allows to provide a program input into a trusted environment. Affected versions of this package are vulnerable to Access of Resource Using Incompatible Type 'Type Confusion' due to a type confusion bu...

Access of Resource Using Incompatible Type ('Type Confusion')

Overview Affected versions of this package are vulnerable to Access of Resource Using Incompatible Type 'Type Confusion' due to a type confusion bug in the CPython interpreter. An attacker can bypass security restrictions by exploiting the try/except clauses. This is only exploitable if the...

PT-2025-4387

Name of the Vulnerable Software and Affected Versions RestrictedPython versions 6.0 through 7.x CPython interpreter versions 3.11 through 3.13.1 Description The issue is caused by a type confusion bug in the CPython interpreter when using try/except. This bug allows RestrictedPython to be bypasse...