CVE-2026-91167 Missing authorization in warpgate
Limited administrators can bypass permission boundaries to extend or reinstate role assignments, potentially escalating privileges within the Warpgate bastion host.
- 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-2026-91167?
CVE-2026-91167 is a medium-severity missing authorization vulnerability in warp-tech warpgate, published on 21 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Warpgate is an open source SSH, HTTPS and MySQL bastion host for Linux. Prior to 0.28.4, PUT /@warpgate/admin/api/users/:id/roles/:role_id reaches api_update_user_role in warpgate-admin/src/api/users.rs through AdminContext but does not require AdminPermission::AccessRolesAssign. A limited administrator with any permission can update expires_at on an existing UserRoleAssignment and clear revoked_at, extending an expiring grant or reinstating a revoked grant. The endpoint cannot create a role assignment that never existed because it returns not found without a matching user and role pair. This issue is fixed in version 0.28.4.
Weakness: CWE-862
Which versions are affected by CVE-2026-91167?
How do I fix CVE-2026-91167?
No fix has been published for CVE-2026-91167 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-2026-91167 being exploited?
There is no known exploitation of CVE-2026-91167 in the wild and no public exploit code.
Sources
Also known as GHSA-fjgc-484v-j6mf.