CVE-2026-86838 Bookly < 28.3 - Unauthenticated Payment Bypass via Booking Price Manipulation
Unauthenticated attackers can manipulate booking quantities to bypass payment validation and book paid services for free.
- 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-2026-86838?
CVE-2026-86838 is a medium-severity vulnerability in Unknown Bookly, published on 28 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The Bookly WordPress plugin before 28.3 does not validate client-supplied booking quantity values on the server before computing the appointment total, allowing unauthenticated users to reduce the total to zero and book paid services for free while bypassing the payment step.
Weakness: CWE-472
Which versions are affected by CVE-2026-86838?
How do I fix CVE-2026-86838?
No fix has been published for CVE-2026-86838 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-86838 being exploited?
There is no known exploitation of CVE-2026-86838 in the wild and no public exploit code.
Sources
Also known as GHSA-8vmp-w5gv-wxrj.