CVE-2026-41189 FreeScout has assigned-only visibility bypass that allows editing hidden customer-authored threads
Attackers can edit hidden customer threads in FreeScout due to missing authorization checks in the thread editing policy.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-41189?
CVE-2026-41189 is a high-severity missing authorization vulnerability in freescout-help-desk freescout, published on 21 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
FreeScout is a free self-hosted help desk and shared mailbox. Prior to version 1.8.215, customer-thread editing is authorized through `ThreadPolicy::edit()`, which checks mailbox access but does not apply the assigned-only restriction from `ConversationPolicy`. A user who cannot view a conversation can still load and edit customer-authored threads inside it. Version 1.8.215 fixes the vulnerability.
Weakness: CWE-863
Which versions are affected by CVE-2026-41189?
How do I fix CVE-2026-41189?
No fix has been published for CVE-2026-41189 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-41189 being exploited?
There is no known exploitation of CVE-2026-41189 in the wild and no public exploit code.
Sources
Also known as GHSA-4h5p-7f5c-q7gj.