CVE-2026-55830
High · 8.3CVSS
8.3
EPSS
0.4%
Published
Jul 8, 2026
CISA due date
—
The record
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. Prior to 8.3, check_function_argument_names() rejected protected guard hook names for regular, variadic, and keyword-only arguments but omitted positional-only arguments, allowing __getattr__, _getitem_, _write_, or _print_ to be shadowed by a local parameter and bypass the embedding application's access policy. This issue is fixed in version 8.3.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
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