Vulnerability · Published Nov 5, 2026 · Assigned by mitre
CVE-2026-123025
Critical 9.4
In plain English
A critical-severity OS command injection in os-acme-client from OPNsense. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 50% of all known vulnerabilities).
Official description
An OS Command Injection vulnerability was discovered in the Google Cloud DNS validation module of the OPNsense os-acme-client plugin through 4.17. The DnsGcloud::prepare() method decodes the dns_gcloud_key model field and directly interpolates the string fields gcloud_account and gcloud_project into a shell command passed to proc_open() via LeUtils::run_shell_command() without any validation or escaping. A remote authenticated user with privileges to issue or renew certificates through the WebGUI/API can achieve arbitrary code execution as root.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| OPNsense | os-acme-client | 0 – through 4.17.0 |
Weakness: CWE-78 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H