CVE-2026-123128 json
GemBooking < 1.7.1 - Unauthenticated Team Member Double-Booking via Cross-Object Race Condition
published 3d ago modified yesterday also EUVD-2026-119831
- cvss
- 3.7
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.1%
- EPSS 0.1% chance of exploitation in 30 days, percentile 3%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- Unknown GemBooking 1.7.1
Is CVE-2026-123128 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 2d ago
Exploit prediction
0.14% chance of exploitation in the next 30 days, higher than 3% of all scored CVEs (FIRST EPSS, 2026-11-11).
Exploits and checks
- wpscan.com https://wpscan.com/vulnerability/e6dd290d-358b-4d03-a585-173d40dee0ba/ referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CISA ADP | 3.1 | 3.7 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N |
| CNA | 3.1 | 3.7 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N |
Affected products
- Unknown GemBooking
Classification
- Weakness
-
- CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization
- Technology feeds
References
-
wpscan.com
/vulnerability/e6dd290d-358b-4d03-a585-173d40dee0ba/
exploit, vdb-entry, technical-description
Sources
- CVE List CVE-2026-123128
- NVD CVE-2026-123128
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.