CVE-2026-108390 HestiaCP Low-Privileged User to Root via Config-Field Injection and PATH Hijacking
Low-privileged users can achieve root code execution by injecting PATH variables into configuration files and hijacking the search command.
- 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-2026-108390?
CVE-2026-108390 is a critical code injection vulnerability in hestiacp, published on 14 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Hestia Control Panel is a lightweight and powerful control panel for the modern web. From version 1.9.7 through 1.10.4, update_object_value() in func/main.sh does not escape single quotes when writing a custom document-root value to a user's web.conf file, allowing a low-privileged authenticated panel user with a web domain to inject an additional PATH field. When the user invokes the ordinary Search feature, the root-privileged v-search-user-object script loads the forged field through parse_object_kv_list_non_eval(), which permits reserved shell-variable names and globally replaces PATH before invoking column without an absolute path. By placing a malicious column executable in the injected search path, the user can execute arbitrary code as root. This residual vulnerability was introduced when version 1.9.7 replaced the raw eval sink addressed by CVE-2026-84984 with parse_object_kv_list_non_eval(), and it is fixed in version 1.10.5.
Which versions are affected by CVE-2026-108390?
How do I fix CVE-2026-108390?
No fix has been published for CVE-2026-108390 yet. Limit exposure of the affected software until one is available.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2026-108390 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-108390 exists.
Sources
Also known as GHSA-r9q4-pmcm-5qqf.