Vulnerability · Published May 13, 2026 · Assigned by GitHub_M
CVE-2026-45158OPNsense: Command Injection via Attacker-Controlled DHCP Config
Critical 9.1
In plain English
A critical-severity argument injection in core from opnsense. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 45% of all known vulnerabilities).
Severity (CVSS 3.1)9.1Critical
Exploit odds (30 days)0.5%top 54.9% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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.
Affected products (as reported)
Weakness: CWE-88 · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
References
- https://github.com/opnsense/core/security/advisories/GHSA-5rx3-w735-74wm x_refsource_CONFIRM