VULNERABILITY INTELLIGENCE

CVE-2026-54552

CVSS score7.9 HIGH
EPSS probability0.17%
CISA KEVNot currently listed
Published2026-08-18
Last modified2026-10-22
CVSS vectorCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N

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.

Weakness classification

  • CWE-273: Improper Check for Dropped Privileges

Primary references