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CVE-2026-108390— HestiaCP Low-Privileged User to Root via Config-Field Injection and PATH Hijacking

Quick assessment

Affected
hestiacp hestiacp
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Hestia 控制面板是一款轻量且功能强大的现代 Web 控制面板。在 1.9.7 至 1.10.4 版本中， 文件中的 函数在向用户的 文件写入自定义文档根目录（document-root）值时，未对单引号进行转义处理，导致拥有 Web 域名权限的低权限认证面板用户可通过注入额外的 PATH 字段实施攻击。当用户触发普通的搜索功能时，以 root 权限运行的 脚本会通过 函数加载该伪造字段。该函数允许使用保留的 shell 变量名，并在未使用绝对路径调用 命令之前，对全局的 PATH 变量进行替换。通过在注入的搜

CVSS 9.9 · Critical EPSS 0.68% · P51

Affected Version Matrix 1

VendorProduct Version RangeStatus
hestiacp hestiacp >= 1.9.7, < 1.10.5 affected
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I. Basic Information for CVE-2026-108390

Vulnerability Information
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Vulnerability Title
HestiaCP Low-Privileged User to Root via Config-Field Injection and PATH Hijacking
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
参数注入或修改
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
hestiacp hestiacp >= 1.9.7, < 1.10.5 -

II. Public POCs for CVE-2026-108390

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III. Intelligence Information for CVE-2026-108390

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Patches & Fixes for CVE-2026-108390 (1)

Other References for CVE-2026-108390 (2)

IV. Related Vulnerabilities

Same product: hestiacp
Same vendor: hestiacp
Same weakness: CWE-88

V. Comments for CVE-2026-108390

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