CVE-2026-112043 Details
Description
A weakness has been identified in calcom cal.com and cal.diy up to 6.2.0. Impacted is the function createWebhookProcedure of the file packages/trpc/server/routers/viewer/webhook/util.ts of the component Webhook Handler. Executing a manipulation of the argument ID can lead to authorization bypass. It is possible to launch the attack remotely. The pull request to fix this issue awaits acceptance.
An authorization bypass vulnerability has been identified in Calcom Cal.com and Cal.diy versions through 6.2.0. The issue arises in the Webhook Handler component, specifically within the createWebhookProcedure function of packages/trpc/server/routers/viewer/webhook/util.ts. The vulnerability allows a team member to manipulate the webhook ID argument, bypass authorization checks, and redirect webhook deliveries to an attacker-controlled URL. This exploitation can lead to unauthorized access to sensitive booking event data.
Users can update to the latest version of Calcom Cal.com or Cal.diy, where this vulnerability has been fixed.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Oct 19, 2026CISA-ADP
Assessed Oct 19, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/calcom/cal.diy/issues/29982 | CISA-ADP | ExploitIssue TrackingTechnical DescriptionVendor |
| https://github.com/calcom/cal.diy/issues/29982 | [email protected] | ExploitIssue TrackingTechnical DescriptionVendor |
| https://github.com/calcom/cal.diy/pull/30223 | [email protected] | Issue TrackingVendor |
| https://vuldb.com/cve/CVE-2026-112043 | [email protected] | AdvisoryPermission Required |
| https://vuldb.com/submit/1009017 | [email protected] | Permission Required |
| https://vuldb.com/vuln/421691 | [email protected] | Permission Required |
| https://vuldb.com/vuln/421691/cti | [email protected] | Content Wall |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-285 | Improper Authorization | [email protected] |
| CWE-639 | Authorization Bypass Through User-Controlled Key | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| calcom cal.com | <= 6.2.0 (semver) |
CPE
Remediation
| |
| calcom cal.diy | <= 6.2.0 (semver) |
CPE
Remediation
| |
Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Oct 19, 2026 | CVE Modified | CISA-ADP |
| Oct 19, 2026 | New CVE Received | [email protected] |