PT-2026-56605 · Zopefoundation · Restrictedpython

Published 2026-07-08 · Updated 2026-07-08 · CVE-2026-55830

Mitre

CVSS v3.1

8.3

High

Base vector

AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:L

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.

Fix

Incomplete List of Disallowed Inputs

Weakness Enumeration

CWE-184

Related Identifiers

CVE-2026-55830

Affected Products

Restrictedpython

References · 3

• https://nvd.nist.gov/vuln/detail/CVE-2026-55830 · Security Note
• https://github.com/zopefoundation/RestrictedPython/commit/3737596ec9f28c34a073cc845bd2f4c0a80cb671 · Note
• https://github.com/zopefoundation/RestrictedPython/security/advisories/GHSA-ffg3-p8fm-mjx2 · Note