CVE-2025-22153
try/except* clauses could allow bypass RestrictedPython via type confusion bug in the CPython interpreter
Description
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.
How to fix CVE-2025-22153
To remediate CVE-2025-22153, upgrade the affected package to a fixed version below.
- —upgrade to 8.0-1 or later
- —upgrade to 8.0 or later
Is CVE-2025-22153 being exploited?
Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 8.0-1
- >= 6.0, < 8.0
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.9 | CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:L |