CVE-2026-104054 PUBLISHED

A security flaw has been discovered in calcom cal.diy up to 6.2.0. This affects the function doesUserIdHaveAccessToBooking of the file BookingAccessService.ts of the component PBAC Permission Engine. Performing a manipulation results in missing authorization. The attack can be initiated remotely. The exploit has been released to the public and may be used for attacks. The pull request to fix this issue awaits acceptance.

• geochen (VulDB User) reporter
• VulDB CNA Team coordinator

• VDB-412762 | calcom cal.diy PBAC Permission BookingAccessService.ts doesUserIdHaveAccessToBooking authorization
• VDB-412762 | CTI Indicators (IOB, IOC, IOA)
• CVE-2026-104054 | CVE Analysis and Report
• Submit #959492 | https://github.com/calcom/ cal.diy commit 4026669 broken access control
• https://github.com/calcom/cal.diy/issues/29802
• https://github.com/calcom/cal.diy/pull/30253
• https://github.com/calcom/cal.diy/

• Missing Authorization CWE
• Incorrect Authorization CWE