CVE-2026-54552
HIGH
7,9
Source: [email protected]
Attack Vector: local
Attack Complexity: low
Privileges Required: high
User Interaction: none
Scope: changed
Confidentiality: high
Integrity: high
Availability: none
Description
AI Translation Available
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.
273
Improper Check for Dropped Privileges
IncompleteCommon Consequences
Security Scopes Affected:
Access Control
Non-Repudiation
Potential Impacts:
Gain Privileges Or Assume Identity
Hide Activities
Applicable Platforms
All platforms may be affected
https://github.com/amoffat/sh/commit/3d855daba91f87a089b490c0d1cf1df3faace2f1
https://github.com/amoffat/sh/pull/776
https://github.com/amoffat/sh/releases/tag/2.2.4
https://github.com/amoffat/sh/security/advisories/GHSA-q38v-wp89-2w55