What is CVE-2026-112043?

CVE-2026-112043 is a medium-severity vulnerability in Calcom Cal.com, classified under Improper Authorization. CVSS score: 6.3/10. Published 2026-10-19.

How severe is CVE-2026-112043?

Medium severity. CVSS v3 base score is 6.3 out of 10.

Auth bypass in Calcom Cal.com

CVE-2026-112043

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.

Published 2026-10-19 · last modified 2026-10-19.

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.com — versions 6.0, 6.1, 6.2.0
Calcom Cal.diy — versions 6.0, 6.1, 6.2.0

Weakness classification (CWE)

References

vuldb.com/vuln/421691 (technical-description, vdb-entry)
vuldb.com/vuln/421691/cti (signature, permissions-required)
vuldb.com/cve/CVE-2026-112043 (third-party-advisory)
vuldb.com/submit/1009017 (third-party-advisory)
github.com/calcom/cal.diy/issues/29982 (issue-tracking)
github.com/calcom/cal.diy/pull/30223 (issue-tracking, patch)

Frequently asked questions

What is CVE-2026-112043?: CVE-2026-112043 is a medium-severity vulnerability in Calcom Cal.com, classified under Improper Authorization. CVSS score: 6.3/10. Published 2026-10-19.
How severe is CVE-2026-112043?: Medium severity. CVSS v3 base score is 6.3 out of 10.