CVE-2026-105193 Booking Calendar < 11.8 - Unauthenticated Booking Information Disclosure and Modification via Predictable Booking Hash
Unauthenticated attackers can predict booking hashes to read personal data or modify bookings in the Booking Calendar WordPress plugin.
- 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-2026-105193?
CVE-2026-105193 is a medium-severity vulnerability in Unknown Booking Calendar, published on 8 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The Booking Calendar WordPress plugin before 11.8 does not generate its per-booking access hashes with sufficient entropy, deriving each from a low-entropy time-seeded value, which can allow unauthenticated attackers who are able to determine a booking's creation time to predict the hash and then read that booking's personal data or modify the booking in place.
Weakness: CWE-326
Which versions are affected by CVE-2026-105193?
How do I fix CVE-2026-105193?
No fix has been published for CVE-2026-105193 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-105193 being exploited?
There is no known exploitation of CVE-2026-105193 in the wild and no public exploit code.
Sources
Also known as GHSA-x92h-fpqj-5752.