Cal: >> Cal.com >> 5.9.15 Security Vulnerabilities
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.
CVSS Score
10.0
EPSS Score
0.001
Published
2026-01-13