OS Command Injection in OPNsense - CVE-2026-57155
Published: July 3, 2026
Vulnerability identifier: #VU136897
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-57155
CWE-ID: CWE-78
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to execute arbitrary shell commands on the target system.
The vulnerability exists due to improper input validation in the Firewall Alias GeoIP importer. A remote user can pass specially crafted data to the application and execute arbitrary OS commands on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Affected software
OPNsense
How to mitigate CVE-2026-57155
Install updates from vendor's website.
OPNsense - addressed in versions 26.1.11, 26.4.1p1