CVE-2026-48811 FreeScout: Thread Deletion Bypasses Mailbox Access Revocation
Former team members can permanently delete internal notes in FreeScout conversations despite revoked mailbox access due to missing authorization checks.
- 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-2026-48811?
CVE-2026-48811 is a medium-severity missing authorization vulnerability in freescout-help-desk freescout, published on 29 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
FreeScout is a free help desk and shared inbox built with PHP's Laravel framework. Prior to 1.8.221, FreeScout allows a non-admin user to permanently delete an internal note (private thread) from any conversation, even after that user's access to the mailbox containing the conversation has been revoked. The ThreadPolicy::delete authorization policy does not verify mailbox membership, so a former team member retains destructive write access to notes they created. This vulnerability is fixed in 1.8.221.
Weakness: CWE-862
Which versions are affected by CVE-2026-48811?
How do I fix CVE-2026-48811?
No fix has been published for CVE-2026-48811 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-2026-48811 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-48811 exists.
Sources
Also known as GHSA-9vx8-gx3p-9mh6.