| Name | CVE-2026-54552 |
| 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. |
| Source | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| Debian Bugs | 1145886 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| python-sh (PTS) | bookworm | 1.14.2-1 | vulnerable |
| trixie | 2.2.1-1 | vulnerable | |
| forky, sid | 2.2.1-2 | vulnerable |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| python-sh | source | (unstable) | (unfixed) | 1145886 |
[trixie] - python-sh <no-dsa> (Minor issue)
[bookworm] - python-sh <postponed> (Minor issue)
https://github.com/amoffat/sh/security/advisories/GHSA-q38v-wp89-2w55
https://github.com/amoffat/sh/pull/776
Fixed by: https://github.com/amoffat/sh/commit/3d855daba91f87a089b490c0d1cf1df3faace2f1 (2.2.4)