CVE-2026-49481

Published: Aug 12, 2026Modified: Aug 13, 2026

9.6

Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N

Exploitability: 3.1 / Impact: 5.8

Source: security-advisories@github.com (Secondary)

Description

UpSnap is a wake on lan web app. Versions prior to 5.4.0 have an OS command injection vulnerability in the UpSnap’s device management functionality due to the presence of unsafe shell command template interpolation using the ip and the mac fields. User-controlled values can be inserted into the wake_cmd and shutdown_cmd templates and executed via /bin/sh -c (Linux) or cmd /C (Windows) without sanitization, resulting in an authenticated Remote Code Execution (RCE). A low-privileged user with permission to create or edit devices can execute arbitrary operating system commands on the UpSnap hosted server. Version 5.4.0 patches the issue.

Related CWEs

CWE-78

Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.

References (2)

https://github.com/seriousm4x/UpSnap/releases/tag/5.4.0

Source: security-advisories@github.com

https://github.com/seriousm4x/UpSnap/security/advisories/GHSA-6mc7-6948-w5h4

Source: security-advisories@github.com

Timeline

No history available yet.