CVE-2026-119409: OPNsense before 26.7.8 Root Command Injection via Firmware Mirror Setting
Published Oct 30, 2026
·Updated
OPNsense before 26.7.8 contains a command injection vulnerability that allows authenticated users with the System: Firmware privilege to execute commands as root by storing a malicious firmware mirror URL. Attackers can submit shell metacharacters through POST /api/core/firmware/set that opnsense-update evaluates with eval, and can also disable package signature verification through sed injection.
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
OPNsenseto a version that resolves this vulnerability.Fixed in 26.7.8
Event History
Oct 30, 2026
CVE Published
via MITRE·11:30 AM
Data Sourced
via MITRE·11:30 AM
DescriptionSeverityWeakness
Data Sourced
via NVD·12:16 PM
DescriptionSeverityWeakness