Medium 5.4Published Oct 23, 2026

CVE-2026-75524OpenReception: race condition in add-to-tunnel and create-new-client allows overlapping appointments for one agent

Updated under an hour ago (Oct 27, 2026, 11:40 PM ET)

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It affects open-reception appointment-booking-software. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for open-reception appointment-booking-software

Exploited in the last 30 days

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.

CVSS: 5.4 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
Weakness (CWE): CWE-367
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Deferred
Record last updated: Oct 23, 2026
First seen by InfoSec Signals: Oct 23, 2026

Affected products

Affected products

open-reception appointment-booking-software open_reception:appointment_booking_software (from the name)	before 2.2.2	CNA record

References

References

https://github.com/open-reception/appointment-booking-software/security/advisories/GHSA-q452-m9pf-qj9j	x-refsource-confirm
https://github.com/open-reception/appointment-booking-software/commit/73663288a8d4ad2ad31d897dc1f494ace2f0e452	x-refsource-misc
https://github.com/open-reception/appointment-booking-software/releases/tag/v2.2.2	x-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.