critical9.8
CVE-2026-23478
Cal.com is open-source scheduling software.
Impact
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
| Vendor | Product | Affected versions |
|---|---|---|
| Cal | Cal.Com | from 3.1.6 before 6.0.7 |