---
id: CVE-2026-39601
title: >-
  Concurrent Execution using Shared Resource with Improper Synchronization
  ('Race Condition') vulnerability in WPdevelop Booking Calendar booking allows
  Leveraging Race Conditions.This issue affects Booking Calendar: from n/a
  through 11.8.4.
summary: >-
  Concurrent Execution using Shared Resource with Improper Synchronization
  ('Race Condition') vulnerability in WPdevelop Booking Calendar booking allows
  Leveraging Race Conditions.This issue affects Booking Calendar: from n/a
  through 11.8.4.
severity: low
cvss: 3.7
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N'
cwe:
  - CWE-362
vendor: WPdevelop
product: booking
affected:
  - booking <= 11.8.4
published: '2026-10-02'
updated: '2026-10-02'
sourceUpdated: '2026-10-02T15:17:09.907'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-39601'
references:
  - url: >-
      https://patchstack.com/database/wordpress/plugin/booking/vulnerability/wordpress-booking-calendar-plugin-11-8-4-race-condition-vulnerability?_s_id=cve
    label: audit@patchstack.com
tags:
  - nvd
  - cve.org
ingestedAt: '2026-10-02T15:21:27.998Z'
---

## Overview

Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') vulnerability in WPdevelop Booking Calendar booking allows Leveraging Race Conditions.This issue affects Booking Calendar: from n/a through 11.8.4.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.