CVE-2025-22153
HIGH7.9EPSS 0.05%try/except* clauses could allow bypass RestrictedPython via type confusion bug in the CPython interpreter
Published: 1/23/2025Modified: 4/28/2026
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.
Affected packages (2)
- Debian/restrictedpythonfrom 0, < 8.0-1
- PyPI/restrictedpython>= 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 |
References (5)
- ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2025-22153
- ADVISORYhttps://security-tracker.debian.org/tracker/CVE-2025-22153
- PATCHhttps://github.com/zopefoundation/RestrictedPython
- WEBhttps://github.com/zopefoundation/RestrictedPython/commit/48a92c5bb617a647cffd0dadd4d5cfe626bcdb2f
- WEBhttps://github.com/zopefoundation/RestrictedPython/security/advisories/GHSA-gmj9-h825-chq2