# CVE-2026-55830: restrictedpython: RestrictedPython is a tool that helps to define a subset of the Python language which allows to provide a program inp...

CVE-2026-55830 is fixed in restrictedpython on 1 platform by DEBIAN-CVE-2026-55830 (version 8.4-1), released July 8, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-55830
- Priority: High
- CVSS: 8.3 (high)
- EPSS: 0.0029
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jul 8, 2026

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | restrictedpython Debian 14 | 8.4-1 | [DEBIAN-CVE-2026-55830](https://patchblox.com/security/data/fix/linux/debian-cve-2026-55830.md) | Jul 8, 2026 |

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Data as of 2026-11-08T06:59:42Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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