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CVE-2026-54552— sh _uid does not drop supplementary groups (incomplete privilege drop)

Quick assessment

Affected
amoffat sh
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Andrew sh是Andrew个人开发者的一款将系统命令转为Python调用的库。 Andrew sh 2.2.4之前版本存在权限许可和访问控制问题漏洞，该漏洞源于sh.py中的_uid选项在Linux和类Unix系统上执行不完整的权限降低，可能导致子进程保留父进程的补充组，从而访问root、docker等特权组的文件或资源。

CVSS 7.9 · High EPSS 0.17% · P7

Affected Version Matrix 1

VendorProduct Version RangeStatus
amoffat sh < 2.2.4 affected
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I. Basic Information for CVE-2026-54552

Vulnerability Information
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Vulnerability Title
sh _uid does not drop supplementary groups (incomplete privilege drop)
Source: CVE Program / CVE List V5
Vulnerability 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 Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
对于放弃特权的检查不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Andrew sh 权限许可和访问控制问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Andrew sh是Andrew个人开发者的一款将系统命令转为Python调用的库。 Andrew sh 2.2.4之前版本存在权限许可和访问控制问题漏洞，该漏洞源于sh.py中的_uid选项在Linux和类Unix系统上执行不完整的权限降低，可能导致子进程保留父进程的补充组，从而访问root、docker等特权组的文件或资源。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
amoffat sh < 2.2.4 -

II. Public POCs for CVE-2026-54552

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 8507 chars
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Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
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Exploit chain & mitigation
POC zip download
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III. Intelligence Information for CVE-2026-54552

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Patches & Fixes for CVE-2026-54552 (2)

Vendor Advisories for CVE-2026-54552 (1)

Vendor Pages for CVE-2026-54552 (1)

IV. Related Vulnerabilities

Same weakness: CWE-273

V. Comments for CVE-2026-54552

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