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CVE-2026-54552

7.9 · HIGH

sh provides Python process launching.

Published Aug 18, 2026CWE-273EPSS 0.17%

Overview

CVE-2026-54552 is a high-severity vulnerability. It was published on August 18, 2026 and has a CVSS 3.1 base score of 7.9 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.9, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

sh provides Python process launching. Prior to 2.2.4, the _uid option in sh.py performs an incomplete privilege drop on Linux and Unix-like systems. When sh runs from an elevated process and launches a command with _uid set to an unprivileged user, the child changes its UID but can retain the parent process's supplementary groups because the privilege-drop sequence does not fully establish the target user's UID, primary GID, and supplementary groups. The child can therefore retain access to files or resources granted to privileged groups such as root, docker, disk, shadow, or sudo, violating the expected _uid privilege boundary. This issue is fixed in version 2.2.4.

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/amoffat/sh/commit/3d855daba91f87a089b490c0d1cf1df3faace2f1GitHubgithub.com/amoffat/sh/pull/776GitHubgithub.com/amoffat/sh/releases/tag/2.2.4GitHubgithub.com/amoffat/sh/security/advisories/GHSA-q38v-wp89-2w55

How CyberStrike helps

Frequently asked questions

What is CVE-2026-54552?

CVE-2026-54552 is a high-severity vulnerability. It was published on August 18, 2026 and has a CVSS 3.1 base score of 7.9 (HIGH).

How severe is CVE-2026-54552?

This vulnerability has a CVSS 3.1 base score of 7.9, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-54552?

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-2026-54552?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-54552 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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