TI-2025-16099 Aliases CVE-2025-22153 GHSA-gmj9-h825-chq2

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

LOW 37CWE-843Published 2025-01-23 · Updated 2025-02-12

Key facts

Attack vector: Network
Privileges required: High
User interaction: None
Attack complexity: High
Impact type: Code execution
Confidentiality · integrity · availability: High · High · Low
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-843 and the CVSS impact.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.004 34th percentileScored 2026-11-07

Fix Fixed RestrictedPython (zopefoundation): 8.0RestrictedPython (PyPI): 8.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
zopefoundation	RestrictedPython	6.0 to before 8.0	8.0	Patch available	CNA
—	RestrictedPython (PyPI)	6.0 to before 8.0	8.0	Patch available	GHSA-gmj9-h825-chq2

RestrictedPython Vendorzopefoundation Affected 6.0 to before 8.0 Fixed in 8.0 Patch available CNA
RestrictedPython (PyPI) Vendor— Affected 6.0 to before 8.0 Fixed in 8.0 Patch available GHSA-gmj9-h825-chq2

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPE	Versions	Role	Vendor
cpe:2.3:a:zope:restrictedpython::::::::	—	—	zopefoundation

cpe:2.3:a:zope:restrictedpython:*:*:*:*:*:*:*:* Versions — — ·zopefoundation

Remediation

Fix · CNA RestrictedPython (zopefoundation) Fixed in 8.0
Fix · GHSA-gmj9-h825-chq2 RestrictedPython (PyPI) Fixed in 8.0 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2025-22153
2026-10-03 Alias added: GHSA-gmj9-h825-chq2

References

Advisory 1

https://nvd.nist.gov/vuln/detail/CVE-2025-22153

Other 3

TI-2011-03162 Unspecified vulnerability in Zope 2.12.x and 2.13.x, as used in Plone 4.0.x through… CVSS 2.0HIGH 9.3
TI-2026-40297 RestrictedPython guard hooks can be shadowed via positional-only arguments CVSS 3.1HIGH 8.3
TI-2024-16328 Products.SQLAlchemyDA vulnerable to unauthenticated arbitrary SQL query execution CVSS 3.1CRITICAL 9.8
TI-2000-00062 The DTML implementation in the Z Object Publishing Environment (Zope) allows remote… CVSS 2.0HIGH 10.0
TI-2024-31821 RestrictedPython information leakage via `AttributeError.obj` and the `string` module CVSS 4.0HIGH 8.7
TI-2024-34640 User data deletion by anoynmous users in Zope CVSS 4.0HIGH 8.7

See all 55 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences