CVE-2026-23478
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.
Scoring
- Severity
- CRITICAL
- CVSS base score
- 10
- CVSS vector
- CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:L
- EPSS probability
- 0.42%
- CWE
- CWE-602, CWE-639
- Published
- 2026-01-13
- Last modified
- 2026-03-12
Affected products
- calcom cal.com
Weakness type
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