CVE-2026-55830 - RestrictedPython guard hooks can be shadowed via positional-only arguments

CVE-2026-55830 - RestrictedPython guard hooks can be shadowed via positional-only arguments

https://cvefeed.io/rssfeed/latest.atom / Thu, 07/09/2026 - 01:04
CVE ID :CVE-2026-55830
Published : July 8, 2026, 10:17 p.m. | 28 minutes ago
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. 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.
Severity: 8.3 | HIGH
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