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CVE-2026-34442— FreeScout: Host Header Injection Leading to External Resource Loading and Open Redirect in FreeScout

Quick assessment

Affected
freescout-help-desk freescout
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.

FreeScout是FreeScout公司的一个使用 PHP（Laravel 框架）构建的超轻量级且功能强大的免费开源帮助台和共享收件箱。 FreeScout 1.8.211之前版本存在安全漏洞，该漏洞源于主机标头操作未经验证，可能导致外部资源加载和开放重定向。

CVSS 5.4 · Medium EPSS 0.32% · P23
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I. Basic Information for CVE-2026-34442

Vulnerability Information
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Vulnerability Title
FreeScout: Host Header Injection Leading to External Resource Loading and Open Redirect in FreeScout
Source: CVE Program / CVE List V5
Vulnerability Description
FreeScout is a free help desk and shared inbox built with PHP's Laravel framework. Prior to version 1.8.211, host header manipulation in FreeScout version (http://localhost:8080/system/status) allows an attacker to inject an arbitrary domain into generated absolute URLs. This leads to External Resource Loading and Open Redirect behavior. When the application constructs links and assets using the unvalidated Host header, user requests can be redirected to attacker-controlled domains and external resources may be loaded from malicious servers. This issue has been patched in version 1.8.211.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
输入验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
FreeScout 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
FreeScout是FreeScout公司的一个使用 PHP（Laravel 框架）构建的超轻量级且功能强大的免费开源帮助台和共享收件箱。 FreeScout 1.8.211之前版本存在安全漏洞，该漏洞源于主机标头操作未经验证，可能导致外部资源加载和开放重定向。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
freescout-help-desk freescout < 1.8.211 -

II. Public POCs for CVE-2026-34442

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III. Intelligence Information for CVE-2026-34442

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Patches & Fixes for CVE-2026-34442 (1)

Vendor Advisories for CVE-2026-34442 (1)

Vendor Pages for CVE-2026-34442 (1)

IV. Related Vulnerabilities

Same product: freescout
Same vendor: freescout-help-desk
Same weakness: CWE-20

V. Comments for CVE-2026-34442

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