CVE-2026-104054: calcom cal.diy PBAC Permission BookingAccessService.ts doesUserIdHaveAccessToBooking authorization

Severity: medium (CVSS 6.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-10-02 · updated 2026-10-02
Weakness: CWE-862

Description

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.

Affected products

calcom cal.diy: 6.0, 6.1, 6.2.0

References

https://github.com/calcom/cal.diy/
https://github.com/calcom/cal.diy/issues/29802
https://github.com/calcom/cal.diy/pull/30253
https://vuldb.com/cve/CVE-2026-104054
https://vuldb.com/submit/959492
https://vuldb.com/vuln/412762
https://vuldb.com/vuln/412762/cti

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