CVE-2026-9349 calcom cal.diy Generic React API bookings-single-view.getServerSideProps.tsx getServerSideProps information disclosure
Remote attackers can access sensitive booking data via the getServerSideProps function in Cal.com's web application.
- 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-2026-9349?
CVE-2026-9349 is a medium-severity vulnerability in calcom cal.diy, published on 24 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A vulnerability was determined in calcom cal.diy up to 4.9.4. Affected by this issue is the function getServerSideProps of the file apps/web/modules/bookings/views/bookings-single-view.getServerSideProps.tsx of the component Generic React API. This manipulation of the argument cancelledBy/rescheduledBy causes information disclosure. The attack can be initiated remotely. The exploit has been publicly disclosed and may be utilized. The vendor was contacted early about this disclosure but did not respond in any way.
Which versions are affected by CVE-2026-9349?
How do I fix CVE-2026-9349?
No fix has been published for CVE-2026-9349 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-9349 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-9349 exists.
Sources
Also known as GHSA-23fj-h8hh-93x3.