# CVE-2026-109143: Cal.com credentials delete cross-team privilege escalation

Source: https://junglewise.ai/threats/cve-2026-109143-a-vulnerability-was-determined-in-calcom-cal-com-and-cal-diy-up  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-13. Updated: 2026-10-16  
License: CC BY 4.0 with a link back

CVE-2026-109143 · Severity: medium · CVSS 5.4 · Published 2026-10-13

Cal.com is a scheduling and calendar management platform. The credentials deletion API endpoint fails to verify that a user belongs to the team whose integrations they are deleting, allowing any authenticated attacker to remove another team's connected apps (Google Analytics, payment processors, video conferencing, etc.). This can disrupt scheduling, cancel unpaid bookings, and delete payment records for victim organizations.

Technologies: [Cal.Com](https://junglewise.ai/threats/technologies/cal-com), [Cal.com Cal.diy](https://junglewise.ai/threats/technologies/cal-diy). Vendors: [Cal.com](https://junglewise.ai/threats/vendors/cal-com).

## Quick answers

**Is CVE-2026-109143 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-109143 being exploited in the wild.

**How severe is CVE-2026-109143?** Medium severity, with a CVSS score of 5.4, published 13 October 2026.

**Which products and versions are affected?** Cal.Com up to 6.2.0; Cal.com Cal.diy up to 6.2.0.

**Is there a fix for CVE-2026-109143?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-109143 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-109143?** Check whether you run Cal.Com or Cal.com Cal.diy at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The /api/trpc/credentials/delete endpoint accepts a teamId parameter but does not enforce authorization checks, allowing authenticated users to delete credentials belonging to teams they do not belong to. Since credential IDs and team IDs are sequential integers, an attacker can enumerate and bulk-delete credentials across multiple teams. The vulnerability requires authentication but no special privileges or user interaction.

## Affected products

- Cal.com cal.com up to 6.2.0
- Cal.com cal.diy up to 6.2.0

## Timeline

- 2026-09-14: disclosed: PoC publicly disclosed on GitHub
- 2026-10-13: advisory: Published to NVD

## References

- [https://gist.github.com/k4z01/7f7739e59ae595f7bdd45922adf2b547](https://gist.github.com/k4z01/7f7739e59ae595f7bdd45922adf2b547)
- [https://vuldb.com/cve/CVE-2026-109143](https://vuldb.com/cve/CVE-2026-109143)

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