CVE-2026-119409 OPNsense before 26.7.8 Root Command Injection via Firmware Mirror Setting
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-119409?
CVE-2026-119409 is a high-severity vulnerability in opnsense core, published on 30 Oct 2026.
Official description
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.
Weakness: CWE-78
Which versions are affected by CVE-2026-119409?
How do I fix CVE-2026-119409?
No fix has been published for CVE-2026-119409 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-119409 being exploited?
There is no known exploitation of CVE-2026-119409 in the wild and no public exploit code.
Sources
Also known as GHSA-p683-f7x2-pm4p, GHSA-q3x8-9859-gj9r.