Is CVE-2026-108390 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-108390 being exploited in the wild.

How severe is CVE-2026-108390?

Critical severity, with a CVSS score of 9.9, published 14 October 2026.

Which products and versions are affected?

HestiaCP Hestia Control Panel 1.9.7 through 1.10.4.

Is there a fix for CVE-2026-108390?

Yes: fixed in 1.10.5. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-108390 attacked?

It is attacked over the network, in a web application.

Am I affected by CVE-2026-108390?

Check whether you run HestiaCP Hestia Control Panel at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-108390: Hestia Control Panel privilege escalation in custom document-root handling

CVE-2026-108390 · Severity: critical · CVSS 9.9 · Published 2026-10-14

Hestia Control Panel is a lightweight web hosting control panel. A low-privileged authenticated user can create a specially-named directory and set it as a custom document root, injecting a malicious PATH variable into their configuration file. When the user runs the ordinary Search feature, a root-privileged script reloads this corrupted configuration and executes an attacker-controlled binary as root, enabling complete server compromise.

Technologies: HestiaCP Hestia Control Panel. Vendors: HestiaCP.

Quick answers

Is CVE-2026-108390 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-108390 being exploited in the wild.
How severe is CVE-2026-108390?: Critical severity, with a CVSS score of 9.9, published 14 October 2026.
Which products and versions are affected?: HestiaCP Hestia Control Panel 1.9.7 through 1.10.4.
Is there a fix for CVE-2026-108390?: Yes: fixed in 1.10.5. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-108390 attacked?: It is attacked over the network, in a web application.
Am I affected by CVE-2026-108390?: Check whether you run HestiaCP Hestia Control Panel at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

Fixed in: 1.10.5

Technical details

The vulnerability chains two flaws in func/main.sh: update_object_value() fails to escape single quotes when writing custom document-root values to web.conf, allowing field injection; parse_object_kv_list_non_eval() then re-parses this file as root without checking for reserved shell variable names, silently overwriting PATH before invoking column without an absolute path. An authenticated panel user with a web domain can trigger this via the standard Search feature through a sudo-invoked root script, achieving arbitrary code execution as root.

Affected products

HestiaCP Hestia Control Panel 1.9.7 through 1.10.4

Timeline

2026-09-15: disclosed
2026-10-14: advisory: CVE-2026-108390 published

References

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