CVE-2026-34443 MEDIUM

CVE-2026-34443: FreeScout: SSRF protection bypass via broken CIDR check in checkIpByMask()

Vendor Freescout-Help-Desk
Product freescout
Weakness CWE-918 · SSRF
Published March 31, 2026
Last update April 1, 2026
View on NVD All CVEs

CVSS base score

6.9/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality —
Integrity —

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

What the vulnerability does

01Description

FreeScout is a free help desk and shared inbox built with PHP's Laravel framework. Prior to version 1.8.211, checkIpByMask() in app/Misc/Helper.php checks whether the input IP contains a / character. Plain IP addresses never contain /, so the function always returns false without checking any CIDR ranges. The entire 10.0.0.0/8 and 172.16.0.0/12 private ranges are unprotected. This issue has been patched in version 1.8.211.

Key dates

02Disclosure timeline

March 31, 2026 CVE published
April 1, 2026 Record updated