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CVE-2025-22153— try/except* clauses could allow bypass RestrictedPython via type confusion bug in the CPython interpreter

Quick assessment

Affected
zopefoundation RestrictedPython
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

RestrictedPython是Zope开源的一个帮助定义 Python 语言子集的工具，该子集允许将程序输入提供到受信任的环境中。 RestrictedPython存在安全漏洞，该漏洞源于在使用“try/except*”时出现类型混淆错误。

CVSS 7.9 · High EPSS 0.40% · P32
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I. Basic Information for CVE-2025-22153

Vulnerability Information
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Vulnerability Title
try/except* clauses could allow bypass RestrictedPython via type confusion bug in the CPython interpreter
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
使用不兼容类型访问资源(类型混淆)
Source: CVE Program / CVE List V5
Vulnerability Title
RestrictedPython 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
RestrictedPython是Zope开源的一个帮助定义 Python 语言子集的工具，该子集允许将程序输入提供到受信任的环境中。 RestrictedPython存在安全漏洞，该漏洞源于在使用“try/except*”时出现类型混淆错误。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
zopefoundation RestrictedPython >= 6.0, < 8.0 -

II. Public POCs for CVE-2025-22153

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 6212 chars
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III. Intelligence Information for CVE-2025-22153

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Patches & Fixes for CVE-2025-22153 (1)

Vendor Advisories for CVE-2025-22153 (1)

IV. Related Vulnerabilities

Same product: RestrictedPython
Same vendor: zopefoundation
Same weakness: CWE-843

V. Comments for CVE-2025-22153

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