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Description

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.

PUBLISHED Reserved 2026-05-08 | Published 2026-05-13 | Updated 2026-05-14 | Assigner GitHub_M




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

Problem types

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

Product status

< 26.1.8
affected

References

github.com/...e/core/security/advisories/GHSA-5rx3-w735-74wm

cve.org (CVE-2026-45158)

nvd.nist.gov (CVE-2026-45158)

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