Improper Access Control in FreeScout Help Desk Software
CVE-2026-40589

7.6HIGH

Key Information:

Vendor

Freescout-help-desk

Status
Freescout
Vendor
CVE Published:
21 April 2026

What is CVE-2026-40589?

An improper access control vulnerability in FreeScout allows low-privileged agents to edit customer entries and add email addresses that belong to hidden customers across mailboxes. This flaw discloses sensitive information, such as the hidden customer's name and profile URL, during a successful operation. It also enables the re-assignment of the hidden email to the visible customer and rebinds associated conversations, potentially leading to unauthorized access to sensitive communications. The issue was resolved in version 1.8.214.

Affected Version(s)

freescout < 1.8.214

References

https://github.com/freescout-help-desk/freescout/security...
x_refsource_CONFIRM
https://github.com/freescout-help-desk/freescout/commit/2...
x_refsource_MISC
https://github.com/freescout-help-desk/freescout/releases...
x_refsource_MISC

CVSS V3.1

Score:
7.6
Severity:
HIGH
Confidentiality:
Low
Integrity:
High
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.