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Vulnerability · Published Oct 19, 2026 · Assigned by VulDB

CVE-2026-112043calcom cal.com/cal.diy Webhook util.ts createWebhookProcedure authorization

Medium 6.3

In plain English

A medium-severity authorization bypass via user-controlled key in cal.com from calcom. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 30% of all known vulnerabilities).

Severity (CVSS 3.1)6.3Medium
Exploit odds (30 days)0.4%top 69.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

VendorProductVersions
calcom cal.com 6.06.16.2.0
calcom cal.diy 6.06.16.2.0

Weakness: CWE-639, CWE-285 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:X/RL:X/RC:C

References