CVE-2026-75524

OpenReception: race condition in add-to-tunnel and create-new-client allows overlapping appointments for one agent

Published Oct 23, 2026 CVSS 3.1 · 5.4 Medium EPSS < 1% KEV · Not listed
Description
OpenReception's appointment booking software provides an end-to-end encrypted appointment booking platform. Prior to version 2.2.2, an attacker overbooks an agent, placing multiple appointments into a single time slot that the system is designed to keep exclusive. The number of overlapping appointments equals the number of concurrent requests, and one booking token is enough because the token is consumed after the insert. This results in the integrity of the booking-calendar breaking and availability being denied to other clients. This issue has been patched in version 2.2.2.

Analysis

No analysis available yet

Remediation

No remediation available yet

Tracking

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Advisories

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History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Open-reception
Open-reception appointment-booking-software
Vendors & Products Open-reception
Open-reception appointment-booking-software
Type Values Removed Values Added
Description OpenReception's appointment booking software provides an end-to-end encrypted appointment booking platform. Prior to version 2.2.2, an attacker overbooks an agent, placing multiple appointments into a single time slot that the system is designed to keep exclusive. The number of overlapping appointments equals the number of concurrent requests, and one booking token is enough because the token is consumed after the insert. This results in the integrity of the booking-calendar breaking and availability being denied to other clients. This issue has been patched in version 2.2.2.
Title OpenReception: race condition in add-to-tunnel and create-new-client allows overlapping appointments for one agent
Weaknesses CWE-367
References
Metrics cvssV3_1

{'score': 5.4, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L'}

Weaknesses
  • CWE-367

    Time-of-check Time-of-use (TOCTOU) Race Condition

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
Oct 29, 2026, 2:33 PM
Reserved
Aug 17, 2026, 8:49 PM
Status
Deferred
Published
Oct 23, 2026, 9:17 PM
Modified
Oct 29, 2026, 3:17 PM