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CVE-2026-55830

8.3 · HIGH

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.

Published Jul 8, 2026CWE-184EPSS 0.40%

Overview

CVE-2026-55830 is a high-severity vulnerability. It was published on July 8, 2026 and has a CVSS 3.1 base score of 8.3 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.3, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/zopefoundation/RestrictedPython/commit/3737596ec9f28c34a073cc845bd2f4c0a80cb671GitHubgithub.com/zopefoundation/RestrictedPython/security/advisories/GHSA-ffg3-p8fm-mjx2GitHubgithub.com/zopefoundation/RestrictedPython/security/advisories/GHSA-ffg3-p8fm-mjx2

How CyberStrike helps

Frequently asked questions

What is CVE-2026-55830?

CVE-2026-55830 is a high-severity vulnerability. It was published on July 8, 2026 and has a CVSS 3.1 base score of 8.3 (HIGH).

How severe is CVE-2026-55830?

This vulnerability has a CVSS 3.1 base score of 8.3, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-55830?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-55830?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-55830 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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