CVE-2026-40589

HIGH SEVERITY

CVSS Score & Metrics

Base Score

7.6 / 10

Vector String

                                        CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:L                                    

Vulnerability Description

FreeScout is a free self-hosted help desk and shared mailbox. Prior to version 1.8.214, a low-privileged agent can edit a visible customer and add an email address already owned by a hidden customer in another mailbox. The server discloses the hidden customer’s name and profile URL in the success flash, reassigns the hidden email to the visible customer, and rebinds hidden-mailbox conversations for that email to the visible customer. Version 1.8.214 fixes the issue.

Vulnerability Details

Published Date

April 21, 2026

Last Modified

April 22, 2026

CWE ID

CWE-639

Source

NVD

Vendor

freescout-help-desk

Product

freescout

External References

https://github.com/freescout-help-desk/freescout/commit/2e2fe37111d92ac665b9ad8806eac94a1a3e502c
https://github.com/freescout-help-desk/freescout/releases/tag/1.8.214
https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-mv55-3mgv-fxwr

CVE-2026-40589

CVSS Score & Metrics

Vulnerability Description

Vulnerability Details

External References

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