cvedb.io
CVE-2026-23478
CRITICAL · CVSS 9.8
EPSS exploitation probability: 0%
Published 2026-01-13T22:16:08.093 · Last modified 2026-06-17T10:21:39.570

Summary

Cal.com is open-source scheduling software. From 3.1.6 to before 6.0.7, there is a vulnerability in a custom NextAuth JWT callback that allows attackers to gain full authenticated access to any user's account by supplying a target email address via session.update(). This vulnerability is fixed in 6.0.7.

Affected products

cal — cal.com

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References

This product uses data from the NVD API but is not endorsed or certified by the NVD. Informational only; not professional security advice.