Home

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.

PUBLISHED Reserved 2026-06-17 | Published 2026-07-08 | Updated 2026-07-09 | Assigner GitHub_M




HIGH: 8.3CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:L

Problem types

CWE-184: Incomplete List of Disallowed Inputs

Product status

< 8.3
affected

References

github.com/...Python/security/advisories/GHSA-ffg3-p8fm-mjx2 exploit

github.com/...Python/security/advisories/GHSA-ffg3-p8fm-mjx2

github.com/...ommit/3737596ec9f28c34a073cc845bd2f4c0a80cb671

cve.org (CVE-2026-55830)

nvd.nist.gov (CVE-2026-55830)

Download JSON