CVE-2026-45158 PUBLISHED

OPNsense: Command Injection via Attacker-Controlled DHCP Config

Assigner: GitHub_M
Reserved: 08.05.2026 Published: 13.05.2026 Updated: 13.05.2026

OPNsense is a FreeBSD based firewall and routing platform. Prior to 26.1.8, unsanitized user input is passed to the DHCP configuration of the configured interface, which is processed by a shell script, allowing remote code execution as root on the underlying operating system. This vulnerability is fixed in 26.1.8.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
CVSS Score: 9.1

Attack Vector	Network	Scope	Changed
Attack Complexity	Low	Confidentiality Impact	High
Privileges Required	High	Integrity Impact	High
User Interaction	None	Availability Impact	High

CVSS 3.1

Product Status

Vendor	opnsense
Product	core
Versions	Version < 26.1.8 is affected

References

https://github.com/opnsense/core/security/advisories/GHSA-5rx3-w735-74wm

Problem Types

CWE-88: Improper Neutralization of Argument Delimiters in a Command ('Argument Injection') CWE