Vulnerability · Published Mar 31, 2026 · Assigned by GitHub_M

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

Medium 5.4

In plain English

A medium-severity improper input validation in freescout from freescout-help-desk. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 13% of all known vulnerabilities).

Severity (CVSS 3.1)5.4Medium

Exploit odds (30 days)0.2%top 87.0% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
freescout-help-desk	freescout	< 1.8.211

Weakness: CWE-20, CWE-601, CWE-829 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

References

https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-822g-7rw5-53xj x_refsource_CONFIRM
https://github.com/freescout-help-desk/freescout/commit/889d75c8e3c15e6a7ddb6a4d4f65cc0379c29213 x_refsource_MISC
https://github.com/freescout-help-desk/freescout/releases/tag/1.8.211 x_refsource_MISC