Auth bypass in Freescout-Help-Desk Freescout

CVE-2026-85744

FreeScout is a self-hosted help desk and shared mailbox. Prior to 1.8.227, the conversation_merge action records a failed authorization check for the target conversation in response['msg'] and then clears that value inside the source-conversation loop. An authenticated agent can merge a conversation they control into a target conversation in a mailbox they cannot access. The operation injects threads, attachments, and audit records into the unauthorized target and deletes the source conversation, but it does not disclose the target's existing contents. This issue is fixed in version 1.8.227.

Vulnerability class: Broken Access Control

Published .

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-85744?
CVE-2026-85744 is a medium-severity vulnerability in Freescout-Help-Desk Freescout, classified under Incorrect Authorization. CVSS score: 5.4/10. Published 2026-11-06.
How severe is CVE-2026-85744?
Medium severity. CVSS v3 base score is 5.4 out of 10.