CVE-2026-84190 LibreNMS before 26.5.0 Remote Code Execution via AboutController
An authenticated administrator can achieve remote code execution in LibreNMS by injecting commands into the snmpget configuration parameter.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-84190?
CVE-2026-84190 is a high-severity command injection vulnerability in librenms, published on 1 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
LibreNMS versions before 26.5.0 contain a remote code execution vulnerability in the AboutController where the snmpget configuration parameter is passed to shell_exec() without proper validation. An authenticated administrator can modify the snmpget configuration to point to a malicious executable file and trigger code execution by accessing the /about endpoint.
Weakness: CWE-77
Which versions are affected by CVE-2026-84190?
2 open source packages ship an affected version, including librenms/librenms.
| Package | Affected | Fixed in |
|---|---|---|
librenms/librenms Packagist | All versions | 26.5.0 |
librenms/librenms Packagist | All versions | 26.5.0 |
How do I fix CVE-2026-84190?
Upgrade librenms/librenms to 26.5.0 or later.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2026-84190 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-84190 exists.
Sources
Also known as GHSA-jf24-8g2h-2wg7, GHSA-p7jp-qp65-h4xf.