Incomplete List of Disallowed Inputs Affecting restrictedpython package, versions [,8.3)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-PYTHON-RESTRICTEDPYTHON-17912186
- published9 Jul 2026
- disclosed8 Jul 2026
- creditUnknown
Introduced: 8 Jul 2026
CVE-2026-55830 (opens in a new tab)How to fix?
Upgrade RestrictedPython to version 8.3 or higher.
Overview
RestrictedPython is a RestrictedPython is a defined subset of the Python language which allows to provide a program input into a trusted environment.
Affected versions of this package are vulnerable to Incomplete List of Disallowed Inputs via the check_function_argument_names process. An attacker can bypass access controls by shadowing protected guard hook names such as __getattr__, _getitem_, _write_, or _print_ through positional-only arguments, potentially circumventing the embedding application's security policy.