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2.1

Cal.com DIY up to 6.2.0 allows booking access without permission

CVE-2026-104054 · published 17 days ago
Summary

The Cal.com DIY service (versions up to 6.2.0) has a flaw in its booking permission check that can let someone gain access to bookings without proper authorization. This can be triggered over the network, potentially exposing private scheduling data. Apply the upcoming fix as soon as it is released or use a temporary mitigation such as restricting access to the booking service until the patch is applied.

What to do

The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.

Affected software
VendorProductAffected versions
calcom cal.diy 6.0
Original advisory text
calcom cal.diy PBAC Permission BookingAccessService.ts doesUserIdHaveAccessToBooking authorization
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.
References
Fix within
Internet-facing 60 days
Internal At next upgrade
  • Not known to be exploited
  • Needs hands-on effort to exploit
  • Gives an attacker partial control
Severity
2.1 Low
Exploitation
<1% chance of attack within 30 days
Type
CWE-862Missing Authorization
CWE-863Incorrect Authorization
Timeline
Published2 Oct 2026
Updated14 Oct 2026
First seen2 Oct 2026
Sources
CVE-2026-104054 · NVD
CVE-2026-104054 · MITRE
CVE-2026-104054 · OSV
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