CVE-2026-39601 WordPress Booking Calendar plugin <= 11.8.4 - Race Condition vulnerability
An attacker can exploit a race condition in the Booking Calendar plugin to manipulate shared resources, potentially altering booking data.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-39601?
CVE-2026-39601 is a low-severity vulnerability in WPdevelop Booking Calendar, published on 2 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-362
Which versions are affected by CVE-2026-39601?
How do I fix CVE-2026-39601?
No fix has been published for CVE-2026-39601 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-39601 being exploited?
There is no known exploitation of CVE-2026-39601 in the wild and no public exploit code.
Sources
Also known as GHSA-c83g-wfv6-9ghj.