CVE-2026-85392 Peppermint through 0.5.5 Authorization Bypass on the User Logout Endpoint
Authenticated attackers can forcibly log out any user, including administrators, by exploiting missing authorization checks on the logout endpoint.
- 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-2026-85392?
CVE-2026-85392 is a medium-severity missing authorization vulnerability in Peppermint-Lab peppermint, published on 3 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Peppermint through 0.5.5 contains an authorization bypass vulnerability in the GET /api/v1/auth/user/:id/logout endpoint that allows authenticated attackers to delete sessions for any user by supplying arbitrary user IDs. Attackers can forcibly log out any user including administrators by calling the logout handler with another user's ID, since the endpoint performs no authorization checks to verify the caller owns the target account.
Weakness: CWE-639
Which versions are affected by CVE-2026-85392?
How do I fix CVE-2026-85392?
No fix has been published for CVE-2026-85392 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-2026-85392 being exploited?
There is no known exploitation of CVE-2026-85392 in the wild and no public exploit code.
Sources
Also known as GHSA-r5f6-fc86-75rh.