Low severity · published Oct 2, 2026
CVE-2026-39601
WordPress Booking Calendar plugin <= 11.8.4 - Race Condition vulnerability
3.7
CVSS
0.2%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
None
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 4% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
BC
Booking Calendar · WPdevelop
through 11.8.4 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-39601
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-39601
vdb-entry
https://patchstack.com/database/wordpress/plugin/booking/vulnerability/wordpress-booking-calendar-plugin-11-8-4-race-condition-vulnerability?_s_id=cve
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