CVE-2025-22153CWE-843

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

High · published January 23, 2025

CVSS v3.1
7.9
EPSS
0%
Percentile
33.3
In the wild
Unconfirmed
What it is

RestrictedPython is a tool that helps to define a subset of the Python language which allows to provide a program input into a trusted environment. Via a type confusion bug in versions of the CPython interpreter starting in 3.11 and prior to 3.13.2 when using `try/except*`, RestrictedPython starting in version 6.0 and prior to version 8.0 could be bypassed. The issue is patched in version 8.0 of RestrictedPython by removing support for `try/except*` clauses. No known workarounds are available.

The record
Technical detail
CVSS v3.1
7.9 · HIGH
Vector
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:L
CVSS v4.0
Not supplied
EPSS
0.00402 · 33.3th percentile
Weakness
CWE-843 · Access of Resource Using Incompatible Type ('Type Confusion')
Published
2025-01-23T17:34Z
EPSS history
Timeline
  • 23 JAN 17:34Z
    try/except* clauses could allow bypass RestrictedPython via type confusion bug in the CPython interpreter
    cvelistv5