What is CVE-2026-123128?

CVE-2026-123128 is a low-severity vulnerability in Gembooking, classified under Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition). CVSS score: 3.7/10. Published 2026-11-09.

How severe is CVE-2026-123128?

Low severity. CVSS v3 base score is 3.7 out of 10.

Vulnerability in Gembooking

CVE-2026-123128

The GemBooking WordPress plugin before 1.7.1 does not serialise concurrent booking requests per team member, allowing unauthenticated users to create overlapping confirmed bookings for the same team member across different bookable items by sending simultaneous requests.

Vulnerability class: Race Condition

Published 2026-11-09 · last modified 2026-11-09.

CVSS v3 metric

CVSS v3 base score 3.7 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Gembooking

Weakness classification (CWE)

CWE-362 — Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition)

References

wpscan.com/vulnerability/e6dd290d-358b-4d03-a585-173d40dee0ba/ (technical-description, exploit, vdb-entry)

Frequently asked questions

What is CVE-2026-123128?: CVE-2026-123128 is a low-severity vulnerability in Gembooking, classified under Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition). CVSS score: 3.7/10. Published 2026-11-09.
How severe is CVE-2026-123128?: Low severity. CVSS v3 base score is 3.7 out of 10.