Vulnerability · Published Oct 23, 2026 · Assigned by GitHub_M
CVE-2026-65825OpenReception: one tenant's throttle row disables the PIN brute-force throttle for the same identifier in other tenants
High 7.5
In plain English
A high-severity security flaw in appointment-booking-software from open-reception. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 12% of all known vulnerabilities).
Official description
OpenReception's appointment booking software provides an end-to-end encrypted appointment booking platform. In versions 2.1.0 and prior, a returning client's six-digit booking PIN can be brute-forced online in the victim tenant. A successful guess yields the client's booking access token, granting access to that client's appointment tunnel, which holds their end-to-end-encrypted appointment data, and the ability to act as the client, for example adding or cancelling appointments in the tunnel. The bypass is cross-tenant: state owned by one tenant removes an authentication protection of a different tenant. This crossing of the tenant boundary is the basis for the scope-changed vector. At time of publication, there are no publicly available patches.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| open-reception | appointment-booking-software | <= 2.1.0 |
Weakness: CWE-307 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:L/A:N