Auth bypass in Calcom Cal.diy
CVE-2026-104054
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.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
- Calcom Cal.diy — versions 6.0, 6.1, 6.2.0
Weakness classification (CWE)
References
- github.com/calcom/cal.diy/ (product)
- github.com/calcom/cal.diy/issues/29802 (issue-tracking, exploit)
- github.com/calcom/cal.diy/pull/30253 (issue-tracking, patch)
- vuldb.com/cve/CVE-2026-104054 (third-party-advisory)
- vuldb.com/submit/959492 (third-party-advisory)
- vuldb.com/vuln/412762 (technical-description, vdb-entry)
- vuldb.com/vuln/412762/cti (signature, permissions-required)
Frequently asked questions
- What is CVE-2026-104054?
- CVE-2026-104054 is a medium-severity vulnerability in Calcom Cal.diy, classified under Missing Authorization. CVSS score: 6.3/10. Published 2026-10-02.
- How severe is CVE-2026-104054?
- Medium severity. CVSS v3 base score is 6.3 out of 10.