Authorization Bypass in Calcom's Webhook Handler Affects Cal.diy and Cal.com
CVE-2026-112043

5.3MEDIUM

Key Information:

Vendor

Calcom

Status
Cal.com
Cal.diy
Vendor
CVE Published:
19 October 2026

What is CVE-2026-112043?

A vulnerability has been identified in Calcom's Cal.diy and Cal.com platforms, specifically within the createWebhookProcedure function in the webhook handler. This flaw enables remote attackers to manipulate the argument ID, potentially bypassing authorization controls. Until a fix is officially implemented, users should apply necessary security measures to mitigate risks associated with this vulnerability.

Affected Version(s)

cal.com 6.0

cal.com 6.1

cal.com 6.2.0

References

https://vuldb.com/vuln/421691
vdb-entrytechnical-description
https://vuldb.com/vuln/421691/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-112043
third-party-advisory

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

geochen (VulDB User)
VulDB CNA Team
.