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CVE-2026-23478
Published: Jan 13, 2026
Modified: Jan 14, 2026
PUBLISHED
Description
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.
| Vendor | Product | Versions |
|---|---|---|
calcom | cal.com | affected >= 3.1.6, < 6.0.7 |
References
https://github.com/calcom/cal.com/security/advisories/GHSA-7hg4-x4pr-3hrg
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