CVE-2026-41191 FreeScout's signature only mailbox permission allows unauthorized mailbox chat setting changes
Attackers with limited mailbox permissions can modify hidden chat settings by bypassing field filters in FreeScout.
- 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-2026-41191?
CVE-2026-41191 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, `MailboxesController::updateSave()` persists `chat_start_new` outside the allowed-field filter. A user with only the mailbox `sig` permission sees only the signature field in the UI, but can still change the hidden mailbox-wide chat setting via direct POST. Version 1.8.215 fixes the vulnerability.
Weakness: CWE-863
Which versions are affected by CVE-2026-41191?
How do I fix CVE-2026-41191?
No fix has been published for CVE-2026-41191 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-2026-41191 being exploited?
There is no known exploitation of CVE-2026-41191 in the wild and no public exploit code.
Sources
Also known as GHSA-wpv9-c2gv-2j82.