CVE-2026-123025

OS Command Injection in OPNsense os‑acme‑client Allows Root Execution via Google Cloud DNS Validation

Published Nov 5, 2026 CVSS 4.0 · 9.4 Critical EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Opnsense
Opnsense os-acme-client
Vendors & Products Opnsense
Opnsense os-acme-client
Type Values Removed Values Added
Title OS Command Injection in OPNsense os‑acme‑client Allows Root Execution via Google Cloud DNS Validation
Type Values Removed Values Added
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.
Weaknesses CWE-78
References
Metrics cvssV4_0

{'score': 9.4, '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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
mitre
Published
Updated
Nov 10, 2026, 1:55 PM
Reserved
Nov 5, 2026, 6:29 AM
Status
Awaiting Analysis
Published
Nov 5, 2026, 7:17 AM
Modified
Nov 12, 2026, 10:09 PM